Overview
University professor George Kingsley is struck by gangsters while crossing the street, leaving him with brain damage and one of the gangsters, Cannon, paralyzed. Kingsley's friend Dr. Sovac attends to both men, and when Cannon offers him a reward for aiding his recovery, Kovac transplants part of Cannon's brain into the dying Kingsley's skull, creating a dual personality.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 49 | April 22, 1951 (60) | |
 | 52 | February 2, 1969 (81) | |
 | 57 | August 16, 1956 (73) | |
 | 24 | July 6, 1966 (50) | |
 | 21 | March 31, 2003 (84) | |
 | 56 | July 26, 1979 (96) | |
 | 31 | September 2, 1951 (43) | |
 | 38 | October 14, 1983 (82) | |
 | 36 | November 16, 1984 (80) | |
 | 52 | June 1, 1979 (91) |