Trigger, Jr. Trigger, Jr. is a 1950 American Western film directed by William Witney and starring Roy Rogers, his horse Trigger and Dale Evans. It was one of a series of Roy Rogers films produced by Republic Pictures.CastRoy RogersDale EvansTriggerPat BradyGordon JonesGrant WithersPeter MilesGeorge ClevelandFrank FentonFoy Willing and the Riders of the Purple Sage (band)