According to the writer Peter S Fischer, this was the pilot for a TV series which the studio decided against making, so this is all there is of Charlie Cobb, private detective.
Charlie is a dapper and lovable rogue, whose vices have had a hand in him losing control of his agency to a rival, so he has no qualms about fiddling his expenses when working. Gulager is terrific in the role. His talent for being quirkily amusing was evident in his performance as Sheriff Ryker in The Virginian - watch him doff his hat at the kitten that wanders into his path at the beginning of 'Ring of Silence', and listen to the exchange with Randy in the saloon at the beginning of 'Morgan Starr' - so It's good to see that comedy potential more fully utilised at last. He's given sterling support by Blair Brown as the long-lost daughter Cobb is delivering to her father, and by Tricia O'Neil as their mysterious travelling companion.
Charlie Cobb makes for a very entertaining hour and a half if you are lucky enough to find it on a television schedule. I just wish it was available on DVD.