The "Texas City" domes were designed by Ron Burton and Martin Bower, featuring intricate kit-bashing from Saturn V rockets and other model parts. Cast and Guest Stars
The episode featured a mix of the regular series cast and notable British guest actors. Martin Landau Lead Alphan commander. Dr. Helena Russell Barbara Bain Stricken with pneumonia during the 1339 detour. Maya Catherine Schell Assisted in the rescue from Moonbase Alpha. Dr. Charles Logan Freddie Jones The scientist leading the Earth-based team. Carla Cross Isla Blair Spazio_1999_02x05
Logan's assistant; Blair also appeared in Year 1 as a different character. Roger Bizley The Scottish clan leader who captures the trio. Critical Analysis The "Texas City" domes were designed by Ron