This page may contain some of the same content as the DC Database article. A more complete and current article is at the DC Comics Database Brian O'Brien (Quality Universe).
Brian O'Brien was a former District Attorney who became the Clock in order to take a more proactive role in crime-fighting. He was an accomplished hypnotist, ventriloquist, pilot, boxer, chemist, inventor, investigator, and master of disguise, and was aided in his endeavors, initially by one 'Pug' Brady, and later by a girl named Butch Buchanan.
- This version of Brian O'Brien (Quality Universe), including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985-86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- The Clock's home base is identified as New York City in Crack Comics #8 Dec 1940.
- The Clock's first appearance can be attributed to either Funny Pages #6 or Funny Picture Stories #1 (both from Centaur Comics/Comics Magazine), as he appears in both issues and they share the same cover date.
- Quality Comics apparently later purchased The Clock from Centaur Comics. The Clock's first Quality appearance was Feature Funnies #3.
- It is also possible that the Clock was owned by creator George E. Brenner (not Centaur Comics) and therefore Quality did not have to buy the character from Centaur, they just had to hire Brenner. At this late date, the truth is unknown.
- In 1992, when Malibu Comics revised many Centaur Comics characters in Protectors, they included the Clock, and DC Comics did not object. This has lead to the general belief that the Clock is now in the public domain. In 2013, the Clock appeared in Masks from Dynamite Entertainment.
- Appearances of Brian O'Brien (Quality Universe)
- Images featuring Brian O'Brien (Quality Universe)
- Quotations by or about Brian O'Brien (Quality Universe)
- Character Gallery: Brian O'Brien (Quality Universe)