- Kurt Busiek
- Brad Walker
- John Livesay
- Pete Pantazis; Lee Loughridge
- Jared K. Fletcher
- Superman; Jimmy Olsen; Kryptonite Man [Dr. K. Russell Abernathy]; K-Monkey; Exomorphic Man (cameo); Robin [Tim Drake] (cameo); Wonder Woman (cameo); Lois Lane; Gina (cameo); Gordan (cameo); Perry White (cameo); Dr. Cyber (cameo); Atomic Skull (cameo); Tobias Whale (cameo); Calculator (cameo); Krypto (cameo); The Ünternet (intro)
- The lab monkey from the tests that created the Kryptonite Man is on the loose, and finds the Kryptonite Man, helping him escape. Jimmy has become a hero, Mr. Action, and debates what to do next. Kryptonite Man takes over Rydertech's labs. Jimmy finds out about it, and as Mr. Action attacks, but is defeated. Superman tracks them down, but is overcome also. As he is tied up in the back, Jimmy doesn't know that Superman's there, and constructs another hypersonic signal device. The signal is answered by Krypto.
- Signal Watch
Story continued from the previous issue and from Countdown (DC, 2007 series) #39, and continues in the next issue. The monkey (which appears to be really an ape) is unnamed, but in a Q&A session on Superman Homepage Kurt says that he calls him K-Monkey.
- Fred Haynes
Fred goes over what his department does, troubleshooting all the artwork and text just before printing. Ads for Action Comics #854, The All-New Atom #14, Countdown #39, and Metal Men #1. Appears on page 34 in this issue.
House ads for: Legion of Super-Heroes in the 31st Century, The Batman Strikes, Countdown to Adventure, Batman, Superman, Wonder Woman, Teen Titans Go!, Green Arrow/Black Canary Wedding Special, and www.johnnydc.com. Appear in various places in the issue.
Total of 3 one-page ads for: Top 10 Ways to Tell if your Home has an Energy Hog (advice, Ad Council/7-Eleven), Yogos Bits (fruit snacks, Kellogg's), and Chaotic (card game, Chaotic USA). Appear in various places in the issue.