Star Cops debuted on BBC2 in 1987, the brainchild of Doctor Who and Blake's 7 writer Chris Boucher, aimed as a police procedural set in the new frontier of commercialised space exploration. Mother Earth Part 1 contains four stories: 1.1 One of Our Cops is Missing by Andrew Smith.1.2 Tranquility and Other Illusions by Ian Potter. 1.3 Lockdown by Christopher Hatherall and 1.4 The Thousand Ton Bomb by Guy Adams. The series hero Nathan Spring is played by David Calder, one of Britain's most regarded stage and screen actors. He is joined by several new characters created for these fresh Star Cops adventures, with Priya Basu played by Eastenders regular Rakhee Thakrar. CAST: David Calder (Nathan Spring / Box), Trevor Cooper (Colin Devis), Linda Newton (Pal Kenzy), Rakhee Thakrar (Priya Basu), Philip Olivier (Paul Bailey).