- Tara Bryan: A&R
- Daniel de los Reyes: Percussion
- Alex Dromgoole: Mixing Assistant
- Dave Emery: Mixing Assistant
- Brandon Flowers: Group Member
- Doug Joswick: Package Production
- The Killers: Composer, Producer
- Tommy Marth: Saxophone
- Paul Normandell: Artwork, Paintings
- Stuart Price: Producer, Mixing
- Robert Root: Engineer
- Ted Sablay: Engineer
- Mark Stoermer: Group Member
- Ronnie Vannucci: Group Member
- Tim Young: Mastering