Curious Case of Major Logan, the Lost Cosmonaut, Battleship Explosion, Dolphins as Secret Weapons

S1, E3: What really happened to a Korean War pilot from the U.S. Air Force who vanished without a trace? Is a bizarre recording evidence that the Russians covered up the macabre death of history's first female cosmonaut? What caused a WW2 battleship to suddenly explode on camera? And, is the U.S. training dolphins... to kill?