Terror Voyage to the Bottom of the Sea : Season 4 Episode 10
TV-G (self-applied) ABC 52m int(0)
Aired: November 26th, 1967 @ 12:00 AM EST on ABC
A scientist experimenting with plant life on a remote island has run into trouble. A shore party from Seaview arrives only in time to hear his dying warning that the world will be taken over in eight hours. Nelson brings aboard the only unusual thing he can find -- a red orchid, which proves to be a malign alien (that proceeds to take over his mind and those of the crew).