The cast includes three actors whose roles involved time travel scenarios:
Cliff Robertson in the episode of
The Twilight Zone (1959) earlier that year titled
A Hundred Yards Over the Rim (1961) portrayed Christian Horn, a wagon train pioneer from 1847 who suddenly finds himself in New Mexico in the 20th century;
Dean Stockwell as Rear Admiral Al Calavicci in
Quantum Leap (1989) was able to provide helpful communication from decades away to friend and time traveler Dr. Sam Beckett (
Scott Bakula) as the latter found himself temporarily occupying the body of a different person in each time location in which he would next find himself; and
Whit Bissell not only appeared as one of the friends of the protagonist time traveler in the original film version of H.G. Wells' classic
The Time Machine (1960) and had another role in a later made-for-TV version,
The Time Machine (1978), but also played Lt. General Haywood Kirk on
The Time Tunnel (1966), playing the military leader of the secret government time travel project of the series title that spends most of its time trying to recover two scientists who were lost in a time travel test mishap, Dr. Tony Newman (
James Darren) and Dr. Doug Phillips (
Robert Colbert).