Specimen: Unknown

"Project Adonis...a laboratory orbiting a thousand miles above the Earth, a tiny, far-flung world connected only by radio and memory...At ten minutes after six on January 8th, Lieutenant Rupert Howard stumbled upon something clinging to the wall of the space-lock that appeared alive. He called them "space barnacles" for temporary identification. They were not." The series' highest-rated episode features a young, uncredited Dabney Coleman as Lt. Rupert Howard, a scientist assigned to the Project Adonis space Station. When he discovers strange life forms clinging to the walls of the space lab, he removes several and incubates them for examination. Quickly, they mature into huge, white flowers and, without warning, spray Howard with a vapor that kills him. The incident triggers an investigation. But when the inquiry is delayed by a shift in station personnel, the deadly plants are already aboard a shuttle and bound for earth! Russell Johnson and Peter Baldwin also star.