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.
- Released: Jan 01, 1970
- Runtime: 00:50:14 minutes
- Genre: Action & Adventure, Drama, Sci-Fi & Fantasy
- Stars: Richard Basehart, David Hedison, Terry Becker, Del Monroe, Paul Trinka, Richard Bull, Robert Dowdell
- Network: ABC
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Se-4 Ep-1. Fires of Death 1967-09-17
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Se-4 Ep-2. The Deadly Dolls 1967-10-01
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Se-4 Ep-3. Cave of the Dead 1967-10-08
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Se-4 Ep-4. Journey with Fear 1967-10-15
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Se-4 Ep-5. Sealed Orders 1967-10-22
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Se-4 Ep-6. Man of Many Faces 1967-10-29
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Se-4 Ep-7. Fatal Cargo 1967-11-05
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Se-4 Ep-8. Time Lock 1967-11-12
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Se-4 Ep-9. Rescue 1967-11-19
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Se-4 Ep-10. Terror 1967-11-26
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Se-4 Ep-11. A Time to Die 1967-12-03
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Se-4 Ep-12. Blow Up 1967-12-10
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Se-4 Ep-13. Deadly Amphibians 1967-12-17
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Se-4 Ep-14. The Return of Blackbeard 1967-12-31
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Se-4 Ep-15. Terrible Leprechaun 1968-01-07
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Se-4 Ep-16. The Lobster Man 1968-01-21
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Se-4 Ep-17. Nightmare 1968-01-28
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Se-4 Ep-18. The Abominable Snowman 1968-02-04
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Se-4 Ep-19. Secret of the Deep 1968-02-11
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Se-4 Ep-20. Man-Beast 1968-02-18
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Se-4 Ep-21. Savage Jungle 1968-02-25
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Se-4 Ep-22. Flaming Ice 1968-03-03
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Se-4 Ep-23. Attack! 1968-03-10
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Se-4 Ep-24. Edge of Doom 1968-03-17
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Se-4 Ep-25. The Death Clock 1968-03-24
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Se-4 Ep-26. No Way Back 1968-03-31
