I have reviewed hundreds and hundreds of old B-westerns and enjoy them very much. However, nearly all the time, I never score any of them higher than a 7 simply because of the low production values and repetitive scripts (with only about 3 or 4 plots in about 99% of the films). So, imagine my surprise when I find one I managed to score a 9...and which really made me adore Johnny Mack Brown. Sure, the script is good and original...but Brown's wonderful easy-going hero really won me over to the film!
"Undercover Man" is a comical western where more often than not, Brown responds to bad guys by outsmarting them and making them look stupid instead of blasting them. In one case, he's being chased by one baddie and Brown's character lassos him and then dumps him out of a tree on the corrupt sheriff! In another, the baddies try to slip him a Mickey Finn (a drink laced with a drug to knock him out)...and he ends up switching the drinks with the badies and they soon all pass out! It often doesn't take itself very seriously but because of Brown's easygoing style, it works wonderfully. See him clean up a corrupt town in the most delightful manner! Clever and fun.