Alpha Scorpio.

Alpha Scorpio was a short-lived Australian children's science fiction television series, written and produced by James Davern, and which aired on ABC Television in 1974. It starred Peter Hepworth and Kevin Wilson as two university students who begin to witness strange events while camping at Aireys Inlet in Victoria. The two soon discover that their friend Mirny is a member of a group of aliens who have recently landed from the 5th planet of Antares. The series lasted only six episodes.