Promises
Hackett and DC Aston are guarding informer Heslop prior to giving evidence against target criminal Collyer. Aston is killed by a bomb placed in Heslop's car. Now Heslop has gone on the run from both Hackett and Collyer.
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Guest stars
Grahame Mallardas Det. Con. FletcherJulian Foxas DC Brian Aston
Donald Sumpteras Heslop
Maurice O'Connellas CollyerAnn Curthoysas Mrs. AstonMichael Newtonas Aston's SonJuanita Smithas Aston's DaughterPeter Deanas Det. Con. George
Kate Fahyas Carol
George Irvingas Scott
David Lelandas MurrayBarrie Cooksonas Partridge
Mark McManusas Wilson
Donald Sumpteras HeslopMaurice O'Connellas CollyerAnn Curthoysas Mrs. AstonMichael Newtonas Aston's SonJuanita Smithas Aston's DaughterPeter Deanas Det. Con. GeorgeKate Fahyas CarolGeorge Irvingas ScottDavid Lelandas MurrayBarrie Cooksonas PartridgeMark McManusas Wilson