The five surviving episodes from the first three series of the long-running ITV drama starring Alfred Burke as down-at-heel private investigator Frank Marker. The first three series of the drama were produced by ABC Television, with the majority of the recordings destroyed - unlike the episodes from the later series, which were produced by Thames Television. The five full episodes that remain from the initial three series find Marker in trademark form, tackling unglamorous private eye cases such as divorces, missing persons and bankruptcies with his trademark diligence.