When the crew of an American tugboat boards an abandoned Russian research vessel, the alien life form aboard regards them as a virus which must be destroyed.
| Actor | Role |
|---|---|
 Jamie Lee CurtisKelly Foster | Kelly Foster |
 William BaldwinSteve Baker | Steve Baker |
 Donald SutherlandCaptain Robert Everton | Captain Robert Everton |
 Joanna PaculaNadia Vinogradova | Nadia Vinogradova |
 Marshall BellJ.W. Woods Jr. | J.W. Woods Jr. |
 Sherman AugustusRichie | Richie |
 Cliff CurtisHiko | Hiko |
 Julio Oscar MechosoSqueaky | Squeaky |
 Levan UchaneishviliCaptain Alexi | Captain Alexi |
 Yuri ChervotkinColonel Kominski | Colonel Kominski |
 Keith FlippenCaptain Lonya Rostov | Captain Lonya Rostov |
| OOlga Rzhepetskaya-RetchinCosmonaut | Cosmonaut |
 David EggbyNorfolk Captain | Norfolk Captain |