We just watched a Twilight Zone episode about a lost WW2 sub. A US destroyer overhead kept hearing a knocking noise like a hammer on metal so they sent a diver down who found the sub. Turns out the Master Chief of the destroyer had been the only survivor of the sub sinking and was going crazy with survivor guilt. Finally he jumped overboard to be back in the sub with his mates. Divers got into the sub and found a skeleton with a hammer in it’s hand. I hope no one jumped overboard from the ship carrying this team!!!
Great episode.
“THERE CALLING MUSTER ON ME!” Still remember it after seeing it way back in the 1960s.