Susan Ivanova discovers a derelict spaceship in hyperspace. They tow it back to Babylon 5, then strange things start happening. People are being telepathically taken over by aliens from another (third)space.
Bruce Boxleitner
Claudia Christian
Mira Furlan
Shari Belafonte
Stephen Furst
Patricia Tallman
Jeff Conaway
Clyde Kusatsu
William Sanderson
Josh Coxx
Judson Mills
Adam Gifford
Kip King
Richard Biggs
Floyd Levine
Jeffrey Anderson-Gunter
Jerry Kernion
Valerie Red-Horse