The Courtship Of Eddie's Father Season 2 Episode 11 The Secret Box

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.