12 Monkeys is an American television series on Syfy created by Terry Matalas and Travis Fickett. It is a science fiction mystery drama with a time traveling plot loosely based on the 1995 film of the same name, which was written by David and Janet Peoples and directed by Terry Gilliam, itself being inspired by Chris Marker's 1962 short film La Jetée; the series credits both Peoples and Marker for their original works.
In the series, Aaron Stanford and Amanda Schull star as James Cole and Dr. Cassandra "Cassie" Railly, who use time travel in an effort to stop the destructive plans of the enigmatic organization "Army of the 12 Monkeys". Kirk Acevedo and Noah Bean also star in the first season. In the second season, Bean makes a guest appearance, and Todd Stashwick, Emily Hampshire and Barbara Sukowa are promoted from recurring guests to regulars. Stanford, Schull and Hampshire play reimagined versions of characters respectively portrayed by Bruce Willis, Madeleine Stowe and Brad Pitt in the 1995 film.
Natalie Chaidez was the showrunner of 12 Monkeys during its first season, assisting Matalas and Fickett. After the season completed she stepped down to the role of consultant for the second season, and Matalas and Fickett became showrunners. In the third season Fickett became a consultant, and Matalas was the sole showrunner. The series is produced by Atlas Entertainment, which produced the original film, and Universal Cable Productions. Charles Roven, producer of the original, is one of the executive producers.
12 Monkeys premiered on January 16, 2015 with a 13-episode first season. In June 2016, it was renewed for a 10-episode third season, which premiered on May 19, 2017, and aired over three consecutive nights. In March 2017, the series was renewed for a fourth and final season consisting of 10 episodes, set to premiere in 2018.