Crew of an undersea mining platform falls prey to mysterious and dangerous parasite. The parasite has the ability to affect people's minds, so survivors can't be certain who is safe and who is infected.
Roddy McDowall
as Dr. Henry Lazarus
Alex Hyde-White
as Jedidiah Pickett
Melanie Shatner
as Catherine Harding
Don Stroud
as Louis
Rodger Halston
as Wyatt
Emile B. Levisetti
as Brill
Richard Biggs
as Hawkes
Sha-Ri Pendelton
as Fife
Miro Polo
as Russian Officer
Tim Trevan
as Russian Boy
