Season
Season 4 Episode
- Season 4 Episode 1
- Season 4 Episode 2
- Season 4 Episode 3
- Season 4 Episode 4
- Season 4 Episode 5
- Season 4 Episode 6
- Season 4 Episode 7
- Season 4 Episode 8
- Season 4 Episode 9
- Season 4 Episode 10
- Season 4 Episode 11
- Season 4 Episode 12
- Season 4 Episode 13
- Season 4 Episode 14
- Season 4 Episode 15
- Season 4 Episode 16
- Season 4 Episode 17
- Season 4 Episode 18
- Season 4 Episode 19
- Season 4 Episode 20
- Season 4 Episode 21
- Season 4 Episode 22
- Season 4 Episode 23
- Season 4 Episode 24
- Season 4 Episode 25
- Season 4 Episode 26
Voyage to the Bottom of the Sea - Season 4 Episode 10 Terror
7.73 50 minutes 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).
