The following information is derived from material held in the Crawford Collection:
Max Phipps (Bradley), Ronald Falk (Alan Roberts), Bob Bruning (Vernon Smith), Geoff Parry (Gardiner), Martin Harris (Thompson), Kurt Ludescher (Hauser), Hu Pryce (Tom Sinclair), Wendy Gilmore (Pamela Vaughan), Gwynneth Hughes (Mrs Green), and Harold Reed (Green/Workman).
The casting call sheets held in the Crawford Collection also show the following information:
Actors considered for the role of Bradley include Richard Miekle, Jeff Ashby, and Tim Elliot.
Actors considered for the role of Gardiner include Bruce Kirkpatrick.
Actors considered for the role of Thompson include Gary Down.
Actors considered for the role of Hauser include Brian James, Syd Conabere, and Terry Norris.
Actors considered for the role of Tom Sinclair include Terry Gill, Maurie Fields, and Vince Martin.
Actors considered for the role of Pamela Vaughan include Beatrice Watts.
Actors considered for the role of Green include Danny Burke.
Actors cast as 'Airport extras' were Jannie Brown, Berta Ross, Jo Randall, David Allshorn, Tony Brazier, Antony Stephens, Gordon Cowie, Charles Gilray, Brian Gregory, Alf Hoff, Wayne Merschell, Wayne Miller, Paul Hammond, and Noel O'Connor.
