A computer program introduces the names of the new cast. Robin surprises Miguel and Kathy with a used car, but all three are surprised when the carburetor is faulty. During their ride, the tailpipe falls off.In Inglewood, California, Kathy participates at a firefighter's school.Lauren Taylor begins the New York City Marathon in the first of a five-part film story.ANIMATIONS: How birds breathe; how fish breathe.THE BLOODHOUND GANG: ""The Case of the Frozen Blob, Part One."" Vikki suspects that a frozen ice sculpture has been stolen. But is it too late to save ""the blob""? (Concludes in next episode.)

Robin goes on a survival trek in the mountains of Wyoming.In Part Two of the New York City Marathon story, Lauren explains the importance of keeping cool.Film insert: warm-blooded vs. cold-blooded animals.Biography: How important is smell to guinea pigs? Biologist Benjamin Shepherd explains this principle to a group of schoolkids.THE BLOODHOUND GANG: ""The Case of the Frozen Blob, Part Two."" Mrs. Belmont-Smith is convinced that the ice sculpture has melted. But a quick taste proves that this melted blob came from the nearby ocean. This, plus a couple of hunches, leads Vikki to find the ice sculpture at a meat locker.

Miguel, Robin, and Kathy help epidemological detectives in their investigation on a food poisoning case. Jackie searches with schoolkids for jumping frogs. In ""The Bloodhound Gang,"" Vikki attends a séance staged by a fortune-teller.

Paco attempts to surprise the others by preparing bread–and ends up surprising himself. In The Bloodhound Gang, Vikki senses something afoul at the séance.

Miguel, Robin, and Kathy have a computer game in waiting for a contest. Can they get anything done by splitting the responsibilities?

Before Miguel can put together a training program for his friends, they spend the day organizing the closet. Miguel and Jackie go to a serious West Point gym drill. Robin discovers how computers begin to help in an athlete's training. In the studio experiment, Miguel shows Paco how things are balanced when the center of gravity is below the point of support.Film insert: Gymnasts.THE BLOODHOUND GANG: ""The Case of X Marks the Spot, Part One."" During a ten-mile run in a small village, one of the runners slips out to steal something a treasure map from an antiques store.

Robin helps Kathy and Miguel to coordinate their schedule of errands, splitting the duties among themselves to get everything done faster.Robin finds out from a pair of jockeys the basics of training thoroughbred horses (it's all about speed). Kathy gets a run-in with speed skaters.FILM INSERT: Ride-and-tie races.THE BLOODHOUND GANG: ""The Case of X Marks the Spot, Part Two."" Only three suspects could have taken the treasure map, but all three ran the race. (Concludes in next episode.)

Carol Lewis (Carl's brother) and her trainer illustrate the mechanics of the long jump. Kathy witnesses a pole-vaulter in training. Robin discovers a variety of bicycles.Film Insert: Bryan Allen flies across the English Channel on a man-powered plane.The Bloodhound Gang: ""The Case of X Marks the Spot, Part Three.""

Kathy is downstairs, exercising while waiting for Miguel to return.

Robin sees two synchronized swimmers in perfect coordination. The Biography segment features a neurologist discussing people's motor skills. A team of high-school boys uses information churned through a computer to assemble a basketball ""dream team"" and predict the score of a game.

Miguel invites Kathy and Robin to Lincoln Park Airport, where he is taking flying lessons. After a brief discussion of the four forces, Miguel acquaints himself with the plane's controls.

Miguel, Robin, and Kathy join the crew of the Macy's Thanksgiving Day Parade as they inflate balloons. Robin takes her first parachute jump.FILM INSERT: Air is there. ANIMATION: Falling paper demonstrates drag.THE BLOODHOUND GANG: ""The Case of the Veiled Thief, Part Two.""

Miguel has entered himself and Robin in a boomerang-throwing competition. But neither knows how to throw a boomerang properly. They get a demonstration on boomerang flight from a professional. In California, Kathy flies an ultralight with a test pilot.Film inserts: indoor airplane flying at Columbia University leads a boy to building a model airplane; the need for great amounts of energy for birds and airplanes to fly.ANIMATION: The four forces involved in flying.THE BLOODHOUND GANG: ""The Case of the Bottled Boat, Part Two."" Armed with a ticket to the Maritime Museum, the gang talks to a model shipbulider who tells all he knows about the stranger with the bottled boat. He's a regular customer, buying ships every week, always with a specially-marked pennant on the mast. (Concludes in next episode.)

Kathy brings a telescope to talk about the changing constellations in the night sky. In the process, Kathy discusses Newton's Laws of Motion. Robin visits NORAD as it observes satellites in orbit. Miguel hears how planes take off and land at an aircraft carrier.FILM INSERT: Flying objects need a lot of fuel to fly.THE BLOODHOUND GANG: ""The Case of the Bottled Boat, Part Three."" The Gang deduces the pennant is marked with a microdot.

Paco is trying to find out what DNA is. Not everyone has the complete answer until somebody calls the wrong number repeatedly. Robin is fortunate to talk with one of the biologists who discovered the basics of DNA.Jackie learns about the breeding of miniature horses. Miguel finds a botanist observing the wildflowers and insects populating a vacant New York City lot.FILM INSERT: The jacquard loom.ANIMATION: Life evolving through DNA.THE BLOODHOUND GANG: ""The Case of The Locked Safe,"" a one-shot surprise that trains the gang to work under pressure. Can they find the new combination to the lock?

Miguel has had it up to his ears with duplicates. He goes to a florist to get the perfect orchid for his mother's birthday. The florist tells him all the orchids in the shop are clones. That prompts Miguel to visit a cytologist for a lesson on cloning plants. Once that's done, Miguel runs into a nice girl at a copy center, for whom he wants to buy another orchid. He doesn't realize she is one of identical twins.Paco tells his dog Franklin about growth hormones. Kathy meets a biochemist who has helped a boy who has not grown as expected, but has been helped with a growth hormone.THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part One."" When the Twins Research Foundation finds several computer files stolen, the gang is called to help follow the directions in the ransom note. Skip must drop the ransom money in a trash barrel at the park.

While Miguel, Robin, and Kathy go off on a picnic, Paco is left to examine Miguel's ants. He then has to scramble for the ants when they get loose. Immediately, Miguel senses that his ants have escaped.A saxophonist imitates the call of a wolf in attempt to understand wolves' ""music."" Miguel examines spiders' webs in the Okefenokee Swamp. Kathy witnesses how the sounds of dolphins are reproduced on computers to help learn about dolphin behavior. Robin watches a monkey being trained to help a quadriplegic.Video insert: ""The Amazing True Story of Tex and George"" tells of a whooping crane who has been attracted to a biologist.THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part Two."" After a cold snap the night before, Vikki and Ricardo stake out the trash barrel in question. A strange lady pours water into the barrel a couple of minutes before Skip arrives with the money. Once the trash is dumped into a garbage truck, the order goes out: ""Tail it.""

Robin visits Mount St. Helens two years after its historic 1980 eruption to see where plant life in the area is attempting a comeback. In the weekly studio experiment, Miguel explains to Paco how fungus colonizes.BIOGRAPHY: Geraat Vermeij, a native of Holland, studies shells.THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part Three."" Vikki discovers that the woman who poured water in the trash can, is left-handed. Looking closer at the pictures, Ricardo realizes that the money–wrapped in plastic–froze to the bottom of the trash barrel. Back at the park, the gang is surprised to hear from a hot dog vendor that the ""lady"" came back for the trash can. In truth, the culprit is a man. (Concludes in next episode.)

Paco sets up a school report on his walk on the beach. He teams up with a chimpanzee and a biologist who studies animal locomotion. At the university, the biologist shows Paco part of the skeleton of Lucy, the great evolutionary find of 1974. Miguel goes to a dinosaur burial ground in northern Montana.THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part Four."" With the barest of clues, a restaurant's souvenir pen, the gang traces the man who stole the computer files.

Miguel, Robin, and Kathy are prepared for a fishing campout. On their way back from fishing, Kathy discovers she has lost the matchbook and ventures out to find it. She finds it, but has she gotten herself lost?At the University of Pennsylvania, Robin learns how taste and smell are connected (and how they differ).Kathy goes to 3M to see the production of scratch-and-sniff.THE BLOODHOUND GANG: ""The Case of the Frozen Blob, Part One."" Vikki suspects that a frozen ice sculpture has been stolen. But is it too late to save ""the blob""? (Concludes in next episode.)

Main Concept: In order for us to see, the eye must convert light energy to electrical energy, which is interpreted by the brain as an image. Robin learns that sight is the dominant sense in some animals. She visits the U. S. Coast Guard in San Francisco and finds how pigeons, with their acute eyesight and color vision, are used to spot survivors at sea. Miguel visits the Computer Graphics Lab in New York City and learns how forms and colors of video images are manipulated electronically to produce pictures.

The kids assemble glasses with varying water amounts for a musical scale. In the process, Paco learns that certain frequencies are beyond the human hearing range. Vikki of The Bloodhound Gang is hired to begin ""The Case of the Girl from Outer Space.""

Paco surprises everyone with a gecko as his present for Robin's birthday. We meet a neurologist who studies the sense of touch in Brooklyn. In ""The Bloodhound Gang,"" Vikki attends a séance as she investigates ""The Case of the Girl from Outer Space."" (Concludes in next episode.)

After a close call, Miguel, Robin and Kathy drill themselves (and the basement) in case of fire. The Bloodhound Gang, en masse, breaks down ""The Case of the Girl from Outer Space.""

Miguel and Paco start the week in the back of a pick-up truck, riding through San Diego Wild Animal Park. They see the prehensile tongue of a giraffe up close. A worker explains how giraffes evolved to its long-necked self.

From the San Diego Wild Animal Park, Miguel and Paco observe elephants flipping dust and dirt on their backs. An evolutionary expoert at the Wild Animal Park explains why elephants have large, sturdy legs.

Miguel and Robin attach a speedometer on a bicycle so they and Paco can see how fast Paco can really ride his bike.

Miguel is chopping wood because he wants to play the violin. He asks Robin to take the wood to Carlene Hutchins, who makes violins, a musical acoustician. She tells how the violin's shape determines its sound. And she makes a violin from wood strips.

Robin has her hands full trying to develop pictures in the makeshift darkroom set up in the basement. In the field, Robin gets a first-hand look on how police use fingerprints as criminal evidence. The Bloodhound Gang cracks ""The Case of X Marks the Spot.""

Robin is ready to ski down a mountain. Miguel and Kathy, who have never skied before, spend their time witnessing a snow-making machine. All three discover a geologist at the mountaintop who explains the nature of glaciers.On location, Miguel flies in a weather plane. Robin goes to the Rocky Mountains to find the origin of the Colorado River.A mock commercial for water, used as a running thread through Episode 100, makes its first appearance.ANIMATION: The water cycle.THE BLOODHOUND GANG: ""The Case of The Locked Safe,"" a one-shot surprise that trains the gang to work under pressure. Can they find the new combination to the lock?