Thriller

A college professor has an affair with a student and kills his wife, but then he receives blackmail letters from someone who claims to know what he did. Patrick O'Neal, Angharad Rees, Michael Kitchen, Gerald Sim, Gary Watson, Patricia Donahue, Terry Wright

A man investigates the disappearance of his brother at a country house. Jenny Agutter, George Chakiris, Anton Diffring, Russell Hunter, John Sharpe, Stephen Greif, Peggy Sinclair, John Atkinson, Barry James, Raymond Mason, Sue Robinson, Peter Casillas, Peter Elliott

A con man posing as a butler, with the help of his girlfriend posing as a maid and a disreputable doctor, poisons his employer, a wealthy widow. Michael Jayston, Nyree Dawn Porter, Barry Nelson, Thorley Walters, Janet Key, Victor Winding, Clare Sutcliffe, Richard Oldfield

A young playboy hires an eccentric husband and wife team of private detectives to investigate the murder of his tycoon father. Gayle Hunnicutt, Stephen Rea, Jean Kent, Christopher Cazenove, Peter Dyneley, Derek Francis, Frances Bennett, Shirley Cain, Oliver Smith, Arthur White, James Appleby, Sally Miles, Francis Mortimer, Gilly Flower

A young woman schemes to marry a wealthy businessman by becoming his secretary. Francesca Annis, Patrick Allen, Moira Redmond, Edward Judd, Gerald James, Barry Stanton, James Bate, Sheila Fearn, Jackie Tong, John Arnatt, Leon Eagles, Jeremy Pearce, Carmen Blanck, Alan Bennion, Sonia Graham, Lisa Young, Jimmy Gardner, Stuart Nichol

A popular member of the Oxford community is killed, and nobody can think why, so a police inspector is called in from Scotland Yard, and discovers they may be more to the victim than met anyone's eye. 'Who Killed Lamb?' is a one off play from Yorkshire TV which has no connection with Thriller but was transmitted immediately after 'Sign It Death' in the second series schedule and was billed and fully networked as an episode of the classic ATV series. An American actor is featured, along with scripted Americanisms like "janitor" While it bears a similar running time [65 minutes], it uses a standalone title scene and theme music. This was quite a prestigious and well-received production at the time.