On the last day of the first manned mission to Mars, a crew member of Tantalus Base believes he has made an astounding discovery – fossilized evidence of bacterial life. Unwilling to let the relief crew claim all the glory, he disobeys orders to pack up and goes out on an unauthorized expedition to collect further samples. But a routine excavation turns to disaster when the porous ground collapses and he falls into a deep crevice. His devastated colleagues attempt to recover his body. However, when another vanishes, they start to suspect that the life-form they have discovered is not without danger.
Liev Schreiber
as Vincent Campbell
Elias Koteas
as Charles Brunel
Romola Garai
as Rebecca Lane
Olivia Williams
as Kim Aldrich
Johnny Harris
as Robert Irwin
Goran Kostić
as Marko Petrovic
Tom Cullen
as Richard Harrington
Yusra Warsama
as Lauren Dalby
Patrick Joseph Byrnes
as Flight Commander Ellis
Lewis Macleod
as Infected Voices (voice)
Paul Warren
as Infected Marko (uncredited)
