He often worked on two films at once
Edward Arnold (February 18, 1890 – April 26, 1956).
Günther Edward Arnold Schneider was an American actor who appeared in over 150 movies. Rather than continue in leading man roles, he gave up losing weight and went after character parts instead. He said, "The bigger I got, the better character roles I received." He was so sought-after, he often worked on two pictures at once. He was an expert as rogues and authority figures, and superb at combining the two as powerful villains quietly pulling strings.
Donna Reed appears with Arnold in Eyes in the Night (1942). A Variety review said, "Outstanding is Donna Reed as Miss Harding's wilful, precocious stepchild... Miss Reed clicks photogenically and otherwise despite hackneyed material."