IT! Terror from Beyond Space
In
1973, the United States Space Commission announces that a spaceship
under the command of Van Heusen has been sent to rescue the first
spacecraft to land on Mars, after receiving notification from its
commander, Col. Edward Carruthers, that he is the lone survivor of
his crew of nine. Under suspicion for murdering the crew, Ed is being
brought back to Earth for a court-martial.
While working in the lower part of the ship, crew member Joe Keinholtz
hears a strange noise and, upon investigating, is attacked and killed
by the Martian. Later, crew member Gino Finelli does not return from
a trip to the lower deck. The lower deck is flooded with fumes, but
when Van opens the hatch to check the results, he is clawed by the
alien.
Later, Ed notices the high oxygen levels in the ship, Eric speculates
that the thin air of Mars has provided the creature with strong lungs.
Ed then orders the crew to don oxygen masks and drains the entire
ship of oxygen, which at last kills the Martian.