On September 1st, 1943, columnist Sheila Graham announced the casting of Shirley Ross, marking Ross' first film appearance in over two years. Less than two weeks later, Ross was forced to withdraw due to illness; she was replaced by Jane Frazee. It was another two years before Ross' next and final film role.
Now, Elmer, sit up here. They're both good boys...
Professor Merlin's Dummy: Good for what?
Professor Merlin: Well, they're just naturally good boys. If I had a dummy like Charlie, I'd get somewhere...
Professor Merlin's Dummy: Yeah, and if I had a ventriloquist like Bergen, *I'd* get somewhere.