Issue: #15
Dr. Arkham and Jonah Hex vs. Dr. Jekyll and Mister Hyde!Has Dr. Jekyll’s formula been fused with the Black Diamond?Plus: In the backup story, Tomahawk teams up with Tecumseh to turn a last stand into a victory.
Creators: Rob Leigh, Joey Cavalieri, Justin Norman, Jimmy Palmiotti, Justin Gray, Michael Atiyeh, Ariel Olivetti, Kate Durré, Phil Winslade
Characters: Alan Wayne, Dr. Jekyll/Mr. Hyde, Jonah Hex, Tomahawk, Amadeus Arkham, Catherine Van Derm
Story arcs: The Black Diamond Probability