Mister Hogan was the monkey sidekick to sailor/adventurer Lance O'Casey. He was also the unofficial first mate on O'Casey's first ship, The Brian Boru. After several adventures, Lance moved on to a new vessel, the Starfish and brought on an actual first mate, Mike Bellow. Mister Hogan's actions from that time onward remain unknown. 
- Diving Helmet: Mister Hogan has his own diving helmet and accompanies Lance O'Casey on underwater work.
- Brian Boru
- Mister Hogan was created by Bill Parker and C.C. Beck for Fawcett Publications. In 1991 DC Comics purchased all of Fawcett's remaining comic-book characters (the ones they did not sell to Charlton Comics in 1953), including Mister Hogan.
- Mister Hogan has a tail, and therefore is a monkey not a chimp.
- 9 Appearances of Monk Hogan (Earth-S)
- 1 Images featuring Monk Hogan (Earth-S)
- Quotations by or about Monk Hogan (Earth-S)
- Character Gallery: Monk Hogan (Earth-S)