Voyage to the Bottom of the Sea featured a very big submarine. This episode features a very tiny submarine, traveling inside the human body on a FANTASTIC VOYAGE.

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• Previously on IMMP: Irwin Allen’s VOYAGE TO THE BOTTOM OF THE SEA (TV Series)
• Previously on IMMP: Twenty Thousand Leagues Under the Sea
• Previously on IMMP: CONAN THE DESTROYER
• Previously on IMMP - The Bixby Boys!
• Fridge Logic - TV Tropes
• Fridge Horror - TV Tropes
• Previously on IMMP: Columbo
• Previously on IMMP: John Carpenter’s ESCAPE FROM NEW YORK
• Innerspace - Wikipedia
• Previously on IMMP: COLOSSUS: THE FORBIN PROJECT
• Fantastic Voyage (TV series) - Wikipedia
• The 11 Best Fantastic Voyage Parodies on TV - Gizmodo
• Fantastic Voyage - Wikipedia