Unremarkable B-movie big top murder mystery was one of Joan Crawford's later paychecks. The plot is slow-paced and the conclusion of the mystery not too satisfying. Much of the running time is padded out with full-length circus acts (including some sideshow performers in a very fun offbeat musical number), which are often more entertaining than the story itself. Watchable, but instantly forgettable.
The implausibility and absurdity of the finale seems to completely obliterate any prior positives the film had going for it. I don’t think my opinion of a film has ever changed as quickly as it did with "Berserk". I went from ‘pleasantly surprised’ in the first 93 mins to ‘so ridiculous, it’s funny’ in the last 3 mins. Not recommended unless you're a huge Crawford fan.