Season 4

Season 4 is the final season of 12 Monkeys that aired on Syfy from June 15 to July 6, 2018 for over 4 weeks. This season contained a total of eleven episodes.

Main cast

 * Aaron Stanford as James Cole
 * Amanda Schull as Cassandra Railly
 * Todd Stashwick as Theodore Deacon
 * Emily Hampshire as Jennifer Goines
 * Barbara Sukowa as Katarina Jones

Recurring cast

 * Tom Noonan as Pallid Man
 * Demore Barnes as Marcus Whitley
 * Alisen Down as Olivia Kirschner
 * Jay Karnes as Robert Gale
 * Scottie Thompson as Mantis
 * Brooke Williams as Hannah Jones
 * Andrew Gillies as Julian Adler
 * Murray Furrow as Lasky
 * Faran Tahir as Mallick
 * Kirk Acevedo as José Ramse
 * Abigail Hardinghm as Emma
 * Julian Richings as Witness Adviser

Guest stars

 * Christopher Lloyd as Zalmon Shaw

Special guest cast

 * Conleth Hill as Bonham

Production
Syfy announced that it had renewed the series for a fourth and final season on March 16, 2017, alongside of the premiere date announcement for Season 3.

The first scripts for Season 4 were written in March 2017. Filming began in April 2017. The final draft of the script for the series finale, entitled "The Beginning", was completed on June 20, 2017.