Overworked Dr. Gillespie (Lionel Barrymore) is forced to pick a new assistant. So he takes three potential candidates (Van Johnson, Keye Luke, Richard Quine) and gives each of them a case to see who will get the position. The main case involves a newly-married woman (Susan Peters) with amnesia.
Barrymore and the series regulars are great. Once again MGM seems to be trying to fill the void left by Lew Ayres. Robert Sterling and Philip Dorn didn't work, so this time they increase their odds. Although, really, only Van Johnson was a serious contender. He does fine. Richard Quine is ridiculous with the worst Australian accent I've ever heard. He would marry pretty Susan Peters after this film. Keye Luke is lots of fun, just as he was during his Charlie Chan years. He gets a lot of the wartime-flavored dialogue about Japs.
This isn't one of the better Gillespie films. The resolution to the main story is very weak. The addition of Johnson and Luke to the cast helps keeps things light (Quine's character thankfully leaves for Australia at the end). It's enjoyable enough if you're a fan of the series but not a good jumping on point for new viewers. Hilarious ending though.