Is it my imagination, or in this "Leviathan" episode, closer to the end, just when Lee Crane turns from watching the sonar board to see the giant hand reaching up outside of the windows of the sub, the "unknown officer" to screen right with one hand on the periscope stand rail, seems to, if you pardon the expression, have an erection? You'll have to slow down the panning of Crane's reaction to the giant hand to notice it. While all officers pants are "flat" in front, this one's obviously hiding something, because the bulge and shadow goes up to his belt, and I think is very obvious.
Could this have been a prank to see if Irwin Allen would catch it? Also, this is the only episode where this officer appears!