For decades, fans have speculated whatever became of Katie Saylor, as she quit the series before its cancellation, then was nowhere to be found in online searches. She seemed to have dropped off the face of the Earth, and people began to wonder if she was, in fact, dead. As of 2019, Katie is very much alive. After a bout of severe illness, she took some personal time off, then decided never to return to acting. She later married and changed her last name. As such, she happily sank into anonymity where she has preferred to remain, well away from Hollywood.
The show benefited from a larger than normal amount of location filming, with familiar sites such as the Hollywood Hills, Zuma Beach, the Bonaventure Hotel in Los Angeles, and Griffith Park Observatory all appearing in various episodes.
Jared Martin and Katie Saylor had previously co-starred in "Men of the Dragon (1974)," where they played brother and sister. As reported by the late Martin, they never got along.
Within a few months of its abrupt cancellation, several of the show's production team would be producing the thematically similar "Logan's Run" (1977) for the fall 1977 season.
"The Fantastic Journey" was released to DVD in a complete series set by Via Vision Entertainment on June 19, 2020.