Steve Montano joins the Thomases and McFarlane for Infinity Inc 19 (Oct 85), the first half of the last Justice League/Justice Society crossover from the classic era, as well as a Crisis on Infinite Earths crossover. Despite this, the Justice League play only a small role in the story, and the Justice Society get little more than a cameo.
The story picks up from the end of the previous issue, as Silver Scarab, Fury, Nuklon, Northwind and the Star-Spangled Kid rush Jade to the hospital, after Mr Bones poisons her with his cyanide touch. The doctor they deal with, Beth Chapel, happens to be the protege of Dr Charles McNider, Dr Mid-Nite.
The Crisis on Infinite Earths plays largely in the background of this issue, as news reports come in about the mysterious red skies. I do love the scene in which a geriatric patient recognizes the Kid, only to learn that they are actually the same age, the Kid having been time lost for so long that he doesn't look it.
The Star-Spangled Kid takes off to tell Jade's parents about her situation, leaving the others behind. At that point, Commander Steel shows up, along with Mekanique, making her debut appearance. Commander Steel relates how he switched Earths during the Crisis, although for him this happened back in 1942, and became an industrialist on Earth-1. He spins a tale about the Justice League having been taken over by terrorists, and recruits Infinity, Inc to travel back to Earth-1 with him and defeat them. Mekanique functions primarily to take people from one dimension to another in this story.
But that's more than the Justice Society do. Dr Fate, Flash, Hawkman and Wonder Woman gather to talk about the Crisis and what it might mean. And that's all they do here.
The new Justice League, Martian Manhunter, Zatanna, Elongated Man, Steel, Vixen, Vibe and Gypsy, show up towards the end of this story. Commander Steel leads the Infinitors on the attack, but it becomes clear pretty fast that this is a personal mission, as he attacks his grandson. Mekanique spirits the two Steels away.
The Infinitors trounce the unprepared Leaguers, though the Manhunter gets them away safely. Infinity Inc has won the battle, but are far from certain they are on the right side.
The story concludes in the next issue of Justice League of America.