Music composed and conducted- by Van Phillips
Written and produced by Charles Chilton

Jet and Lemmy thought they heard the voice of Peterson coming over the radio, but it proved to be only the recorder which had been left running. Soon afterwards, contact with Control was reestablished. As the Discovery approached Mars, Jet felt strangely apprehensive. The ship went into free orbit round the planet, preparatory to landing, but just before they touched down a strange noise was heard and Jet had difficulty in keeping the ship under control.

(Repeated on Sunday at 6.0)