Long-serving cast members included John Fegan (Inspector Jack Connolly), Terry McDermott (Detective Sergeant Frank Bronson), Lex Mitchell (Detective Rex Fraser), George Mallaby (Detective Peter Barnes), Leslie Dayman (Senior Detective Bill Hudson), Leonard Teale (Senior Detective David Mackay), Gary Day (Senior Detective Phil Redford), Alwyn Kurts (Inspector Colin Fox), Norman Yemm (Senior Detective Jim Patterson), Charles Tingwell (Inspector Reg Lawson), Don Barker (Detective Sergeant Harry White), Dennis Grosvenor (Senior Detective Mike Deegan), John Stanton (Senior Detective Pat Kelly), Lionel Long (Senior Detective Bert Costello), and Michael Preston (Senior Detective Bob Delaney).