- Script
- Frank Tieri (credited)
- Pencils
- Inaki Miranda (credited)
- Inks
- Inaki Miranda (credited)
- Colors
- Eva de la Cruz (credited)
- Letters
- Dave Sharpe (credited)
- Genre
- superhero
- Characters
- Harley Quinn; Joker; Red Tool; Batman [Bruce Wayne]; Egghead; Clayface; Riddler; Mr. Freeze; Catwoman; Killer Croc
- Synopsis
- Old Lady Harley and Red Tool visit Batman in an attempt to find out why the supposedly dead Joker has reappeared. When Batman sends them to Catwoman, they visit her in Arkham Asylum only to end up recruiting a small group of Arkham villains to travel back in time to Las Vegas on the day Joker supposedly died. However, they don't arrive in Vegas, but in Blüdhaven instead.
- Reprints
- Keywords
- Arkham Asylum; Transporter Scrambler 3000
- Script
- ?
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- ?
- Synopsis
- Interview with Geoff Johns discussing his work on Doomsday Clock (DC, 2018 series).