Complex sentence: Switzer's last starring roles were in a brief series of imitation- "Bowery Boys" movies; he reprised his "Alfalfa" character, complete with comically sour vocals, in PRC's "Gas House Kids" comedies of 1946 and 1947.
Split into simpler sentences: Switzer's last starring roles were in a brief series of imitation- "Bowery Boys" movies. He reprised his "Alfalfa" character, complete with comically sour vocals, in PRC's "Gas House Kids" comedies in 1946 and 1947.