Crabb served in WWII in the Royal Navy and was a certified badass. In 1956, he was recruited by MI6 to do recon of a Soviet cruiser. He put on his scuba gear and slipped under the water. Except, once he went under the water, he never came back.

Some time later, a body with no head or hands floated up on the shore, in scuba gear. No one could determine if it was Crabb, but it’s generally assumed that the Soviets had him disappeared.