From Wikipedia page about the short:
“The Gernsback Continuum” was adapted during 1993 as Tomorrow Calling, a short TV film by Tim Leandro for Film4 Productions. Originally shown on Channel 4, the film was also presented at the British Film Festival, 4–10 October 1996.
Directed by Tim Leandro
Writing Credits (in alphabetical order)
Cast (in credits order)
Full cast list available on IMDb website.