Overview
The industrialist's daughter has been kidnapped by the mad inventor Ravello, but Harry Peel stays hot on their trail with the help of his dog Greif. Behind a waterfall, he discovers the hidden gate to Ravello's castle, where the fiercest of battles now break out between the two and Harry finds himself confronted with a staircase that has been electrified and, once again, with the deadly robot.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 30 | March 27, 1963 (70) | |
 | 41 | April 28, 1945 (63) | |
| - | - | |
 | 46 | July 4, 1952 (75) | |
| 75 | March 11, 1931 (83) |