Just read your review of Phantom of Chinatown. I am curious if you have seen any of Karloff's Mr. Wong films. At one point I was considering purchasing a boxed set from Oldies.com, but have read some not so good reviews of this series.
I can't say that I've seen any of the Karloff "Wongs." But some of the dialogue in PHANTOM gives the impression that Keye Luke is supposed to be the son of the original Wong. Also, having watched PHANTOM two more times, it's started to grow on me. Lotus Long is still a stiff performer, but Luke is very relaxed and personable. I wish the series could have continued with him as the lead.
