The Nikita connection
https://www.imdb.com/search/name?roles=tt3148266,tt1592154Prior to creating 12 Monkeys, co-creators Terry Matalas and Travis Fickett both worked as writers on the CW action spy series Nikita.
It seems they loved their team so much they brought a lot of them along for the 12 Monkeys ride.
Nikita alumni include:
Actors (continuing roles in Nikita)
Aaron Stanford as James Cole – played ‘Nerd’ Seymour Birkhoff
Noah Bean as Aaron Marker – played Ryan Fletcher
Xander Berkeley as Col. Foster – played Percy
Peter Outerbridge as Elliot Jones – played Ari Tasarov
Actors (guest roles in Nikita)
Amanda Schull as Cassandra Railly – played Naomi Ceaver
Romina D’Ugo as Max – played Dina
Scottie Thompson as Mantis – played Mia
In fact according to IMDB there were a total of 157 cast and crew shared across the two shows!!