The script held in the Crawford Collection in the AFI Research Collection contains the following character notes (excluding regular characters):
'CARL REID: About thirty. Hard, tough. He's been in trouble as long as he can remember. He knows no other way of life than committing crimes and trying to avoid the consequences. Roz is his soft spot.
'ROZ THOMPSON: Mid twenties. Though young in years, she's been around. Attractive, resourceful, tough. She's completely wrapped up in Carl and would do anything for him. Drives.
'ROCKY WALKER: About forty. One time boxer turned stand-over man. He's almost a match for Carl. Has the same creed of looking after No. 1 first. He is homosexual, but this is not obvious in his appearance or mannerisms.
'TONY GREY: Early twenties. Pleasant, good looking. He is completely out of his depth with Carl and Rocky. Before Gaol he would have led a quiet life working in an office and living at home.
'BENNETT: Thirties. Preferably tall to contrast with Smith. Affable. Easy going.
'SMITH: Thirties. Somewhat overweight. Pessimistic glutton.
'BRIAN YOUNG: Forties. Affable. Considers himself the life and soul of any party. Flying is his life.
'JILL: Twenties. Attractive country girl. Drives.
'JOE: Fifties. Amiable - but tough when confronted by Carl Reid.
'GUARD (JACK): Any age. Few lines.
'GUARD (JIM): Any age. Few lines.
'DOCTOR FOX: Any age. Few lines.
'FARMER: Middle age. No lines.
'EVANS: Forties. Slight, shifty man. Few lines.
'ANDERSON: Forties. Big, bluff, no nonsense man. Few lines.
'TAYLOR: Thirties. Preferably bigger than Evans. Few lines.
'POLICE CONSTABLE: Any age.'