The Zat: Secret Files (Patreon)

This particular short story went through a lot of iterations: Zat in Mercanik's role, Zat and Mercanik being set upon by twenty or so other villains led by 'Ranger and Argent, the train being in the Himalayas and derailing at Catfish's old lair, Cross was involved and fought a tiger in one version and there was a draft set in a Siberian mammoth preserve. But the Mancuso "reveal" was always there, and I realized that was the focus over all the other spectacle, so I'm glad I paired it back down to it's essentials as a story.