The character of pompous police Chief Inspector Charles Rose (William Mervyn) at the start of series 3 cemented the show's popularity, and The Odd Man turned out to be the first in a trilogy lasting most of the 1960s, during which Rose's character slowly developed and became increasingly genial as they progressed.
This series originally dealt with the investigations of theatrical-agent-cum-detective Steve Gardiner (played by Geoffrey Toone in the first season, replaced by Edwin Richfield thereafter).
Barron left at the end of series 1, to be replaced by Anthony Ainley in the role of Detective Sergeant Hunter.
The theme tune for Mr Rose was by John Snow, and was issued on a single as a cover version by Roy Budd on the Pye Records label in 1967.
A separate cover version was recorded on the album Time For TV by Brian Fahey and his Orchestra, on the Studio 2 Stereo label.