Civil engineering contractor Robert Ballard (George Baker) has used bribes and slush money to buy business for his company. One day he is approached by a young man who shows him a roll of computer print-out paper. On it are the names and addresses of the clients he has bought. The intention is obvious: blackmail. But Ballard is not so easily intimidated. He realises that the computer engineer, Bernard Fermor (David Dixon), is nothing more than the messenger boy. Through an underworld contact, Ballard hires two heavies to tail Fermor and find out who is behind the blackmail attempt. The answer brings him closer to home than he would like. Chief Superintendent Hewlett has his own ideas about the uses to which this evidence can be put. Murder, violence and corruption in high places are the themes of this tautly written thriller which moves to a dramatic and inevitable climax.

Peter Davison appears in an early dramatic role, as Ballard's son-in-law Edwin Styles.

Co-starring

Peter Davison (Doctor Who)
David Dixon (The Hitchhiker's Guide to the Galaxy)
John Ringham
Joseph Brady (Z Cars)
Bill Waddington (Percy Sugden - Coronation Street)
Bill Tarmey - (Jack Duckworth - Coronation Street)
Derek Martin (Charlie Slater - Eastenders)

Broadcast 26th May 1979