The following cast details are taken from annotations (in blue ink) on the character notes in the script:
John Cobley (Sammy Walker), Rowena Wallace (Primrose Taylor), Brian Anderson (Ben Walker), Margaret Rodriguez (Janine Fisher), Joanne Kloster (Bev Adams), Clive Hearne (Dr Alcott), Mike Jacobsen (Jim Harris), Arthur Barradell-Smith [spelt Barradel-Smith] (Captain Richards), Esme Gray (Old Lady), Faye Sharpe (Mary Walker), Karen Peterson (Mrs Fenton), Lindy Buggy (Sally Green), William O'Donnell (Mr Phillips), Warwick Randall (TV Serviceman), Danny O'Meara/Jack Perry (Smith), and Arthur Roberts (Police Sergeant).
'Smith' seems to have been a difficult part to cast: two indistinguishable names are written next to the character note, and then crossed out. Danny O'Meara's name in written beneath them. Next to this is written 'Jack Perry?'