The Cleaner (2008) - 1x08 - Let It Ride

The wife of a renowned horse jockey seeks out William. Her husband, who has used the ADD medication Adderall for years in order to make weight, has been exhibiting hostile, frenetic behavior of late. William maneuvers the jockey into treatment, but he breaks out in a violent episode and heads for the track. William realizes that he is fighting the man's addiction to his sport as much to drugs. In a bittersweet turn, the jockey rides and wins, only to collapse and die moments afterward. William must accept that not every addict can be saved.