Casablanca

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             Her father, who acts to reward the hero for his efforts, is Rick's knowledge that he has sacrificed for the greater good. Also Renault, because he admires what Rick has done rewards him by not having him arrested. .
             Casablanca also fits well into Tzvetan Todorov's theories of Equilibrium and disequilibrium, the theory that a narrative is a fictional environment, which begins with a state of equilibrium (all is how it should be) which then suffers some disruption (disequilibrium), before a new equilibrium is produced at the end of the story. There are in fact five transformations through which an event can pass, as Casablanca is both a love story and a thriller you can take either one of these and apply Todorov's theories to it. .
             CASABLANCA AS A LOVE STORY.
             1 a state of equilibrium all is in order; although you would not describe Rick as happy, his life in Casablanca is in order. He has a successful business, loyal employees and a life style he seems okay with.
             2 a disruption of the ordered state by an event, Isla comes to Rick's cafe dredging up all the deeply buried hurt of her rejecting him in Paris.
             3 a recognition that a disruption has taken place; Rick goes to the bar and gets Sam to play "As Time Goes Buy" as he talks of his frustration at Isla's arrival "of all the gin joints in all the towns in all the world, she has to walk into mine", he drowns his sorrows and ponders on painful memories of the past.
             4 an attempt to repair the damage of the disruption; Rick attempts to get Isla (the love of his life) back in the market, when he apologises for what he said when he was drunk in the bar, the night before, and asks her to visit him at the apartment above the saloon. Thinking at this point I suspect, that she left him because he was unsettled and on the run, concluding that now he has a stable life she might return to him. His attempt fails though, as she reveals Victor Laslo is her husband.