The fourth season begins with romance as the theme grouping the artists profiled here, including photographer Laurie Simmons, media artist Pierre Huyghe, and painters Judy Pfaff and Lari Pittman.

“Protest” is the theme. Profiled: painter Nancy Spero, photographer An-My Le, media artist Alfredo Jaar and conceptual artist Jenny Holzer.

Ecology is the theme. Profiled: photographer Robert Adams, and sculptors Mark Dion, Ursula von Rydingsvard and Iñigo Manglano-Ovalle.

Paradox is the theme. Profiled: painter Robert Ryman, filmmakers Mark Bradford and Catherine Sullivan, and media artists Jennifer Allora and Guillermo Calzadilla.