Special Guest Stars Victor Garber as Admiral Tom Halsey Guest Stars BJ Tanner as Marcus Finn Kai Wener as Ty Finn John Fleck as Krill Ambassador Korin James Read as Vice Admiral Paul Christie Simon Templeman as Krill Consul Co Starring Kyra Santoro as Lieutenant Jenny Turco Gavin Lee as Nurse Henry Park Randy Jay Burrell as Arachnid Alien Mike Bash as Security Crewman