Unusual premise that warrants a comment. Meekly honest Foursquare Farley (Gage Clark) has used his brick-laying skills to open a secret passage into a Denver bank. He's used the reserves to finance his house 21 game, but always repays his "loans" (what about interest?) in a conscientious manner. Then, along comes arrogant safe-cracker Big Ed Murphy (John Dehner) and his two hapless helpers who plan to crack the bank's safe. But if they do that, the secret passage will be discovered and Foursquare's banking privilege will be kaput. So Foursquare and his buddy Bret decide to thwart the gang by using the secret access into the vault.
The resulting game of now-you-see-the-greenbacks-and- now-you-don't is a hoot, made more delicious by bringing down the smugly superior Big Ed, in one of the versatile Dehner's customarily fine performances. I'm not sure what the "wrap-around" con game with Tamblyn (John Holland) is supposed to accomplish, even though seeing Bret get conned in the opening sequence is pretty funny. It's almost like this was a sequence edited out of an unused episode and inserted here. This may not be classic Maverick (no artfully seductive con-woman), but it's still a clever premise that remains highly entertaining.