I loved this film. I don't care if it was planned to be a serious film about undercover drug busting. It was funnier than most other comedies made intentionally to get laughs. It had the feel of It happened one night, and one or two other surprise films. Claire Trevor is a serious actress, yet she pulled this off wonderfully. Fred MacMurray, as we know, swings both ways, and could do comedy as well as dramatic stuff. Instead of Claire, a better choice might have been Lauren Bacall or possibly Claudette Colbert. But Trevor gets the job done. One extra scene at the end was completely unnecessary. The film should have ended at the border, as its natural conclusion was far funnier than the eventual ending.