In 1978, the first space probe to Saturn returns and the Seaview is sent to retrieve it. Despite their stringent decontamination procedures an alien life form survives and, once inside, begins to take over the ship.
Did You Know?
Late in the filming of the second season, Richard Basehart
fell ill during the filming of this show and was unable to complete that episode and work in the next two. It was rewritten to minimize the part of his character, Adm. Nelson (knocked out of action in the first act), with a stand-in used for many shots with the face hidden and lines dubbed. See more
When the Admiral brings the probe aboard he his worried about contamination but then unprotected crewman handle it before the decontamination crew gets to work. See more