Eccentric, socially awkward brother-in-law of Doug with unpredictable behavior.
Doug is Alan's brother-in-law and acts as the initial point of contact when Alan's behavior becomes dangerous.
Alan develops a romantic connection with Cassie during the pawn shop retrieval, shifting his focus away from the Wolfpack.
Phil and Alan share a direct alliance as fellow hostages and partners in the mission to locate Chow.
Stu and Alan work closely together during the Tijuana operation, despite Alan's tendency to accidentally compromise their plans.
Alan is forced into a hostile negotiation with Marshall, tasked with locating Chow under the threat of Doug's execution.
Explore the full interactive character relationship map of The Hangover Part III