There are actually two film versions of this novella. One is from 1939 and the other from 1992. I'll assume you are referring to 1992.
Candy never came into the room when Lennie and Crooks were talking to each other.
Lennie's hallucination...
The Question and Answer section for Of Mice and Men is a great resource to ask questions, find answers, and discuss the novel.
There are actually two film versions of this novella. One is from 1939 and the other from 1992. I'll assume you are referring to 1992.
Candy never came into the room when Lennie and Crooks were talking to each other.
Lennie's hallucination...
I think many of the characters in this novella have impairments to reflect their humanity. Lennie is mentally challenged, Candy feels old and useless, Curley's wife is merely a possession and Crooks has a physical impairment as well as his...
Candy offers to use his savings to help pay for the farm, as long as he can join George and Lennie.