The Secret Box

S2, E11: When Eddie's girlfriend Elsie learns she's an adopted child, she plants in Eddie's mind the suspicion that he is, too. Elsie finds the adoption papers when she pries open a locked box in her father's desk. She persuades Eddie that if he opens a similar box in Tom Corbett's desk, he'll make a similar discovery. Eddie is discovered opening the box. Tom shows him the contents, Eddie's birth certificate, a marriage license and things of special meaning to Tom.