Revealing mistake: When Spats Columbo's gangsters are being searched for weapons at the Florida Hotel, the man doing the pat search can be seen placing the gun behind the gangster's leg, just before it supposedly drops out of his trouser leg.
Revealing mistake: When Joe and Gerald escape down the balconies you can see that the view of the ocean is painted, specifically the waves don't move.
Answer: Amazon.com has the colorized version.
ChiChi