It starred Walter Pigeon, who made the movie look like they were using left-over scenes from Forbidden Planet because the sub's set designers created a low-budget version of the Martian. Lots of blinking lights and set pieces that looked like those Columbia Pictures "Voyage to the Moon or Mars" rocket-ship interiors. There were some very convincing circular windows in the " nuclear reactor" that had blinking orange lights behind them. They looked just like a nuclear reactor, too!
The other cool touch to the set was the doors that were sometimes those oval submarine or ship doors and then sometimes regular, rectangular, industrial doors with a sprinkler system pipe and cut-off valve. Yes, that really looks they were in a submarine guys.... or in a corner of the sound-stage possibly? Who could tell? It fooled me!
Next we see Peter Lori "walking" an obviously fake shark in a tank of water. I'm sure he had a big role later in the movie as the submarine shark trainer. I'll bet that shark got loose, too! I guess that they contemplated using a real shark and Peter wisely said, "No way!"
Suddenly while guiding the under sea guests who comprised of a Congressmen and a Congresswomen along with the original "don't squeeze the Charmin" guy who was a reporter we hear a "wild, blues trumpet solo." Cut to a full frame shot of Barbara Eden's ass wiggling wildly in a tight "navy" dress. Next we see that it is non other than Frankie A pretending to play the trumpet that we hear. Suddenly it's like an Elvis movie except with Frankie in it!
Barbara Eden is the "only woman on board" so says the second-in-charge guy. He takes Miss Eden out into the hall and asks her to explain her actions (the wild dancing) and suddenly they fall into a serious lip lock. Oh..... they're secretly in love. Was Elvis supposed to star in this in it's original form? All we need are those fake band guys instead of Frank and it would be ready for the King to make an entrance. I'd watch that!
I gave up at this point and watched an AC/DC concert on VH1.