

Brian Blessed screaming through time dilation at the speed of light — what more do you need?
The spaceship Altares, with a photon drive capable of accelerating it to the speed of light, leaves an Earth-orbiting space station. The Altares crew, two families of scientific specialists, journey at light speed with time-dilation to Alpha Centauri, where they launch several satellites to transmit information on the Centauri star system back to Earth and guide future manned vessels in exploring. The Day after Tomorrow (also known as Into Infinity in the United Kingdom) is a 1975 British science-fiction television special produced by Gerry Anderson between the two seasons of Space: 1999. It stars Brian Blessed, Nick Tate, Joanna Dunham, Katherine Levy and Martin Lev. It aired in the United States on NBC as part of the network's Special Treat childrens series in December 1975, and in the UK on BBC1 in December 1976.
Practical Effects
Gerry Anderson's miniature spacecraft porn — those models aged beautifully
Acting
Brian Blessed somehow makes astrophysics feel like Shakespearean bellowing
Production
BBC children's TV budget stretched to interstellar proportions

Director
Charles Crichton
Trivia, insights & behind the scenes
This aired as NBC's 'Special Treat' — a dumping ground for educational content disguised as weekend programming for restless American children.
Gerry Anderson used this as a stealth pilot for Space: 1999's second season tone, testing how audiences handled harder science concepts.