The script held in the Crawford Collection in the AFI Research Collection contains the following character notes (excluding regular characters):
'RICKY: A 31 year old rocker. Tall, good-looking in a lean sparse way. A dreamer, reluctant to face reality until the very last. The driver.
'CHAS: Also a 31 year old rocker. Shorter, heavier, not so good looking. Like Ricky, missed the bus in '64 when rock collapsed, but unlike Ricky, a pragmatist. The mechanic.
'CASSIE STEVENS: About 17. Pretty, little make-up. Dresses casually. Carefree, impulsive, with no past, no future, just the present. A realist in her own reality.
'HELEN: About 21. Second-year law student. Into Womens' and any other minority Rights [sic]. Confident, at times aggressive. An idealist.
'CROFT: About 28. Well groomed, fashionably dressed. Confident, easy, yet plausible. A competent salesman.
'EMPLOYER/MANAGER:/ MR. GOODISON: About 55. Soberly dressed. No nonsense type. Knows his job, probably worked his way up from the Print Shop floor. A conservative.
'SERVICE STATION PROPRIETOR: Mid 40's. Slow, easy going type, who proves too trusting.
'SKINHEAD #1 #2. Young, weazle [sic] faced, looking for action and finding it. Drives.'