Jean G

Doomsday - S1-E19

Continuity mistake: Captain Crane removes a failsafe key, which is hanging outside his uniform collar, from around his neck. It wasn't there in the previous shot. (00:10:30)

Jean G

Show generally

Factual error: "Invaders": The ship's doctor claims that carbon 14 dating proves the man from the undersea capsule to be 20 million years old. Not likely. Carbon 14 testing can date once-living matter only within the last 70,000 years, and is generally considered accurate only within the last 50,000. (00:23:00)

Jean G

Long Live the King - S1-E15

Deliberate mistake: The Seaview's 8 huge picture windows were a concession to design over practicality. Though they knew that such big windows could never withstand deep sea pressures, the producers wanted the characters - and the audience - to be able to see all the underwater wonders "up close." The "impossible" windows became one of the show's most popular features. (00:25:10)

Jean G

Long Live the King - S1-E15

Revealing mistake: One of the saboteurs sneaking into the palace keeps looking up at someone off camera. He's not watching the door he just entered by, so who's he looking at in what should be an empty corner of the room? (00:00:30)

Jean G

Escape from Venice - S2-E5

Continuity mistake: Nelson takes the captured assassin's knife and says that Alicia was killed with one just like it. But he can't possibly know that. He never saw the body or the weapon. Only Crane was with Alicia when she was murdered, and Crane, still missing in action, hasn't been in contact with Nelson. (00:42:15)

Jean G

Escape from Venice - S2-E5

Continuity mistake: Nelson spins the roulette wheel. We see a close-up of the wheel slowing down. Cut back to a full shot, and now the wheel is spinning faster than ever, even though no one has touched it. (00:42:15)

Jean G

The Phantom Strikes - S2-E17

Plot hole: The Seaview's crew have a wild shootout aboard ship, and their bullets are seen to go all the way through a 6-inch-thick hatch door. Gee, you'd think that somewhere during their military training, somebody would have taught these guys why firing high velocity weapons on a submerged submarine is a really bad idea. (00:38:15)

Jean G

The Phantom Strikes - S2-E17

Factual error: The Seaview's military history computers need an upgrade. The derelict German sub is identified as a WWI ship, the U444, supposedly sunk in 1918. There were only 167 U-boats in WWI. U444 wasn't built until 1942. And the sub's design is definitely WWII, not WWI. (00:02:30)

Jean G

The Return of the Phantom - S2-E26

Deliberate mistake: Kroeger's ghost takes over Crane's body when the captain is injured, but still alive. In "The Phantom Strikes," Kroeger told Nelson his host had to be dead first. This "fact" needed to be altered in the sequel so that Crane could survive to be rescued at the end. (00:16:00)

Jean G

The Phantom Strikes - S2-E17

Visible crew/equipment: When Nelson says, "Let's get out of here," the shadow of the entire camera rig moves by on the side of the navigation console. (00:07:45)

Jean G

The Phantom Strikes - S2-E17

Factual error: The derelict sub is said to have suddenly moved itself more than 30,000 sea miles from its original position. This makes no sense. The entire circumference of the Earth is only 22,000 sea miles. And if the sub had somehow circled the globe plus an additional 8,000 sea miles, there'd be no way to tell that it hadn't simply moved just 8,000 miles. (00:08:10)

Jean G