KING OF THE COWBOYS: Hired by the governor to track down a ring of treasonous saboteurs, Roy Rogers infiltrates a tent show to uncover the ringleader's coded secrets. MY PAL TRIGGER: Considered by many to be Roy Rogers's best western, this unusual but charming film tells the life story of his beloved horse, Trigger, from birth to his role as Rogers's trusty sidekick. While mostly focused on the relationship between a cowboy and his horse, the film also contains all the makings of a great B-western: tense drama, action, and fast-paced hi-jinks.