The script held in the Crawford Collection in the AFI Research Collection contains the following character notes (excluding regular characters):
'JOHNNY MILES. Aboriginal boxer. Aged 20 plus. Being trained for Australian championship fight. Johnny is intelligent and reasonably educated. He is easy-going about most things, but has a streak of temper and is upset by Ruthie who taunts him about his colour. As a result of Ruthie's interference, Johnny hits his sparring partner so hard that the sparring partner appears to have died as a result.
'RUTHIE MILES. Johnny's wife. Aged 20 plus. She is an ex come-on dancer in a tent show who previously felt that marriage to Johnny would be desirable. Now, however, she blames her marriage to an aboriginal [sic] for her lack of success as an actress, refusing the realise [sic] that this is caused by her own lack of ability. She resents Johnny's success in his own field, and seizes the opportunity to kill his sparring partner, hoping Johnny will be blamed.
'VIC AHEARN. Johnny's trainer. Aged 40 plus. He is grooming Johnny for the title fight but knows that Johnny can't win, and hopes to pick up a packet by betting against Johnny.
'TONY MALLOY. Aged 40 plus. A smooth, dangerous S.P. bookie who has combined with Ahearn to make money out of Johnny's certain loss of his title fight. Driver.
'WALTER CARSON. Johnny's sparring partner and the murder victim. Older than Johnny. A near punchy ex-fighter, who was quite promising when young, but who later degenerated to fighting in a tent show. He is an amiable soul, none too bright. Ruthie pretends friendship with him in order to annoy Johnny. Boxer.
'CHIPPER. A lad, at present doing odd jobs around the training camp, but hoping to be a fighter one day. Young and arrogant. Boxer.
'BUILDER. Age optional. A tradesman doing jobs around the camp. Driver.
'PATHOLOGIST. A competent man who delivers Fox information about the medical aspects of the case.
'SPARRING PARTNER. A young boxer - prospective sparring partner for Johnny after the death of Walter Carson.'