The submarine featured on "Voyage to the Bottom of the Sea" is called the Seaview and it's supposed to be the most modern and wonderful ship afloat. How, then, does the crew of this great ship seem like such an awful group of misfits?? You'd think they'd be the most professional and well trained crew you could get...yet in so many episodes you see them fighting, insubordinate and in this one a couple of the crew members rifle through a scientist's belongings and read about his work! Personally, I think Admiral Nelson would have been better to get chimps or inmates of an institute for the criminally insane to run his ship!!
There is a LOT of stuff going on in this episode of "Voyage to the Bottom of the Sea". Dr. Ames (Robert Loggia) is aboard with a woman he claims is 200 years old and he's got some formula to make people young. Then, there's a portion of the sea he needs to get to that is filled with sunken ships! And, it's apparently because of a weirdo creature that looks a bit like a HUGE jellyfish that shots out lightning!! If that seems like a lot, you also learn that the Doctor has got issues and will do ANYTHING to make sure the monster is killed and he's able to gain access to one of the sunken ships to get some sort of equipment or plans related to his life-extending research. He's a lot like a more insane version of Captain Ahab!!
All in all, apart from the stupid cliche involving the crew, an enjoyable episode. Sure, the monster seems silly to look at, but it was 1966...and for that era it's not too bad. Enjoy.