Brennan was the pilot of the cargo plane used by George Lawala to smuggle Drs. Alan Grant and Ellie Sattler, along with five adolescent Velociraptors, off of Isla Nublar. After noticing a weight-shift on the plane, caused by the escape of the Raptors, and after Lawala fails to return from investigating, Brennan heads out to investigate himself, leaving the plane on autopilot. After almost being shot by Lawala by accident, the pair are attacked by a female Raptor (which shall later be named Celia), and although Lawala injures it, both Brennan and Lawala are killed.

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