After the sad death of Warner Oland, Sidney Toler takes over the Charlie Chan character, the first of many films he would make in the series.
While Charlie Chan awaits the arrival of his first grand child, a call comes in about a murder that has taken place on a cargo ship. Number 1 son Jimmy (Victor Sen Yung) takes the call and decides to take the case himself. He discovers the case of a murdered man on the ship, a number of suspicious characters, a hold full of circus animals and some missing cash! Luckily, Charlie Chan turns up to save his son from being thrown overboard and he takes over the case. One complication being the rather mysterious character Dr Cardigan (George Zucco) who is acting quite suspiciously and has a live brain in a suitcase!
A great entry in the Charlie Chan series, Sidney Toler bringing some new energy to the role. The kitchen sink was thrown at the film, quite why we needed subplots involving mad science brains in jars and escaped lions is unknown. It does not spoil the film though, its superb.