The following information is taken from the cast list for this episode, held in the Crawford Collection (access to which is restricted):
Jack Thompson (Robbo), Lesley Baker (Babs Taylor), Terry Gill (Earl Taylor), Ken Wayne (Frank Nash), Tony Allyn (Wes Parker), Jessica Ball (Lisa Robinson), Alfred Hartvigsen (Keith Harding), Tony Sprague (Truck driver), Warwick Randall (Jimmy Mulligan), Frank Gow (Chicka Dempsey), Roger Boyce (Const. Jack Reed), Paul Jansen (Car driver: Extra), and Keith Halliwell (Stunt driver).
Note: Actor Terry Gill's name and his character's name have been typed in the wrong columns on the cast list, so it appears as though the actor Earl Taylor will be playing a character called 'Terry Gill'.