O'Hara said that Flynn "was a pro" who "came to work prepared. He rehearsed hard and practised his fencing sequences very meticulously." O'Hara did admit Flynn drank on set, often smuggling in alcohol by injecting it into oranges and eating the oranges. She said "everything good that we got on film was shot early in the day" and that Flynn would start drinking by morning and be of no use after 4 pm. She had to perform many of her close ups for love scenes opposite a black flag with an "x" on it while a script girl read lines. "It was hard to watch him, very frustrating, but you forgave him because what he had given you earlier in the day had been so terrific."