It's All the Tycoon's Fault

Listening to Dr. Hansen, both Luke and Tony got strange expressions on their faces.

By the time she was done, Luke had already been staring at the tycoon with a complicated expression for a long while. He finally said, "Hm… this is why you need to be a decent person."

Tony's expression changed, and he cursed several seconds later. "F*ck you!"

As for who the "you" referred to, that was a matter of opinion.

What made them react this way was Dr. Hansen's explanation of Killian's love-hate relationship with Tony.

It was 1999 in Bern, Switzerland, on Christmas Eve. Tony slept with Dr. Hansen, and also took a look at her research project – Project Extremis.

Using dendritic cells to recode the human body could allow a person to " regrow" missing parts, like a plant.

After sleeping with Dr. Hansen, Tony casually wrote down an equation after a flash of inspiration, solved a key problem with Project Extremis, and left.