Overview
A scientist develops a formula which will cause animals to regress to the form of their primitive ancestors, and tries it on himself with disastrous results.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 52 | November 29, 1992 (92) | |
 | 35 | March 9, 1969 (50) | |
 | 23 | November 14, 2008 (78) | |
 | 34 | November 30, 2019 (100) | |
| 59 | July 5, 1972 (78) | |
 | 22 | 94 | |
 | 26 | December 5, 2008 (82) | |
 | 44 | March 29, 1967 (58) | |
| 51 | January 30, 1967 (64) | |
 | 37 | February 2, 1970 (54) |