Son of Flubber
Keenan Wynn and his father Ed Wynn appear together in this film. Keenan also played Alonzo Hawk in "Son of Flubber" (1963) and for a third time in "Herbie Rides Again" (1974). Keenan's son Ned also appears uncredited in a bit part. Ed Wynn also appeared in "Son of Flubber". At this stage of his life, Ed Wynn's memory was fading and he couldn't remember his lines; but he retained his innate wit and invention, so he improvised much of his dialogue, while director Stephenson instructed his crew to "just let him go on and on. You see, he had the most wonderful imagination."