"The Beginning Part 1" is the tenth episode of the fourth season of 12 Monkeys, and the forty-sixth episode overall. This episode is also the first part of the two-part series finale.
The final battle against the Witness begins as the fate of time and mankind hangs in the balance; all the pieces finally come together to mark the end of the beginning.
- Aaron Stanford as James Cole
- Amanda Schull as Cassandra Railly
- Todd Stashwick as Theodore Deacon (credit only)
- Emily Hampshire as Jennifer Goines
- Barbara Sukowa as Katarina Jones
- Kirk Acevedo as José Ramse
- Andrew Gillies as Julian Adler
- Julian Richings as Witness Adviser
- Alisen Down as Olivia Kirschner