The Long Arm was an Australian television series shown in 1970. The series was made in-house by the Ten Network as part of an attempt to rival the cop shows produced by Crawford Productions such as Homicide and Division 4. The Long Arm was set in both Melbourne and Sydney and as well as its episodes being based on real-life cases, attempted to introduce a soap opera feel by examining the private lives of the detectives. Nineteen episodes were produced. The Long Arm was also the name of an unrelated 1956 film starring Jack Hawkins.

Sydney homicide detective Sergeant Scobie Malone and his offsider investigate the murder of Helga, whose corpse is found in the basement of the Sydney Opera House.