#21

Synopsis

Barry investigates who or what killed Professor Zoom, and finds that his body shows signs of the same radiation as the smiley face button that appeared in the Batcave when the original Wally West returned from outside of time. Barry and an injured Batman use the Cosmic Treadmill to trace the source of the radiation through time.

Reprinted in

• Batman / The Flash: The Button - Deluxe Edition #[nn]
• Batman #10
• The Flash Rebirth Deluxe Edition #2
• Batman Rebirth #11
• Batman / Flash: O Bóton #[nn]
• Batman / Flash: The Button #[nn]
• Batman by Tom King #2

Credits

Script

Joshua Williamson

Pencils

Jason Fabok, Howard Porter

Inks

Jason Fabok, Howard Porter

Colours

Brad Anderson, Hi-Fi

Letters

Steve Wands

Editor

Brian Cunningham

Assistant editor

Arianna Turturro

Other printings & variants

• Jason Fabok Lenticular Cover
• Howard Porter Variant Cover
• Mikel Janin International Variant Cover
• Newsstand