Band
- Frank Iero – rhythm guitar, backing vocals
- Matt Pelissier – drums
- Ray Toro – lead guitar, backing vocals.
- Gerard Way – lead vocals
- Mikey Way – bass guitar
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Additional musicians
- Bert McCracken – additional vocals on "You Know What They Do to Guys Like Us in Prison"
- Keith Morris – additional vocals on "Hang 'Em High"
- Rinat – additional vocals on "The Ghost of You"
- Howard Benson – 1958 Hammond B3
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Production
- Produced by Howard Benson and Mike Plotnikoff
- Engineered by Eric Miller
- Mixed by Rich Costey (1, 2, 5, 6) and Howard Benson
- Mastered by Tom Baker, at Precision Mastering, Hollywood, California
- Pro Tools and programming by Paul DeCarlli
- Drum tech by Jon Nicholson, at Drum Fetish
- Guitar tech by Keith Nelson
- A&R by Craig Aaronson
- Management by Brian Schechter
- Production coordination by Matthew Griffen and Dana Childs
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Design
- Artwork by Gerard Way and Mark Holley
- Photography by Justin Borucki
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