Robert Picardo (The Doctor) and Jeff Kober (Iko) were both previously regular cast members on China Beach (1988). They played Dr. Dick Richard and Sgt. Evan 'Dodger' Winslow, respectively.
F.J. Rio (Joleg) also played Enrique Muniz in DS9: Starship Down (1995), Hard Time (1996), and The Ship (1996), and also as the Vissian chief engineer in Cogenitor (2003).
Jimmy Ortega is a stuntman, stunt actor, and stunt coordinator who appeared in three Star Trek spinoff series. He only received credit for his first appearance. His stunt costume from the Star Trek: Voyager episode "Repentance" was sold off on an online auction.