It's a gawky young Clint, before he went to Italy and came back with that hard-eyed squint that terrified bad guys for a whole fistful of years. Still, he does manage a pretty big load of mean. He's also got a pretty big part here, probably just before he slipped into the Rowdy Yates role in Rawhide. Garner, of course, is Garner, doing his usual reluctant rescues with the usual great throw-away lines-- Buchanan to Maverick, "Isn't there anything you like better than money?" Maverick, "There's breathing."
Note how the LA smog works well to mask the climactic gunfight (many series scenes were shot on Warners' backlot in Burbank). It's a great Maverick ending, perfectly in sync, with a couple of neat twists that should leave you with a knowing nod and a good chuckle.