Season
Season 4 Episode
- Season 4 Fires of Death
- Season 4 The Deadly Dolls
- Season 4 Cave of the Dead
- Season 4 Journey with Fear
- Season 4 Sealed Orders
- Season 4 Man of Many Faces
- Season 4 Fatal Cargo
- Season 4 Time Lock
- Season 4 Rescue
- Season 4 Terror
- Season 4 A Time to Die
- Season 4 Blow Up
- Season 4 Deadly Amphibians
- Season 4 The Return of Blackbeard
- Season 4 Terrible Leprechaun
- Season 4 The Lobster Man
- Season 4 Nightmare
- Season 4 The Abominable Snowman
- Season 4 Secret of the Deep
- Season 4 Man-Beast
- Season 4 Savage Jungle
- Season 4 Flaming Ice
- Season 4 Attack!
- Season 4 Edge of Doom
- Season 4 The Death Clock
- Season 4 No Way Back
Voyage to the Bottom of the Sea - Season 4 Episode 26 No Way Back
7.72 50 minutes Seaview experiences a sudden power overload and blows up, killing all hands aboard. When Admiral Nelson (who was at the Nelson Institute at the time of the accident) hears of the destruction of the Seaview, he gets an impossible to refuse offer from Mr. Pem (who survived from A Time To Die): in exchange for the use of the sub's nuclear reactor, Pem will transport Nelson back in time to before the explosion which destroyed Seaview. Once back in time, Pem renergizes his time travel device and brings the sub back even further in time to the American Civil War. Before the crew has time to absorb this, the ship is boarded by Major General Benedict Arnold! Now Nelson has to stop Pem's far-reaching plan to take over the world and avoid the explosive disentergration of Seaview.
