A signal from deep space gives Moonbase Alpha’s crew a much-needed bit of excitement after a long dry spell. An Eagle is dispatched to find the source of the transmission, but it is destroyed as it draws close to the object. When Alan Carter takes an Eagle with a rescue module to retrieve the previous Eagle’s crew – or their remains – an object passes his ship at high speed, eventually colliding with the moon. When Professor Bergman examines the object, he discovers it’s composed of various minerals – and a trace of human tissue. Carter’s copilot, Kelly, undergoes an unusual transformation while performing a spacewalk to retrieve one of the other Eagle pilots. Moonbase Alpha continues receiving an indecipherable signal, though Kelly could be the key to interpreting it…but the only way for Koenig to find out is to attempt a risky mental link with Kelly and whatever has taken over the pilot’s mind.
written by Christopher Penfold
directed by Charles Crichton
music by Barry Gray
additional music by Gustav Holst
Guest Cast: Shane Rimmer (Kelly), Carla Romanelli (Melita), Prentis Hancock (Paul Morrow), Clifton Jones (David Kano), Zienia Merton (Sandra Benes), Anton Phillips (Dr. Mathias), Nick Tate (Alan Carter), Derek Anders (Wayland)
LogBook entry by Earl Green