Enoch, Atarah and others in “Unfinished Business”

Enoch

I have not seen this future myself, but there is only one logical conclusion. If anyone can solve the mysteries of time travel, it is Leopold Fitz.

This is true?

Simmons

It's possible. Likely, even, but he hasn't done it yet, and the chances of him re-creating it are next to zero.

Explain.

Simmons

If he did this, he'd have his whole life to figure it out and the end of the world as motivation.

You claim he is your best friend, but we are the last of our kind. You have knowledge that could aid us. What would motivate him to do what we need?

Enoch

[Points at Simmons] Her. Put Jemma Simmons in danger, and Fitz can solve anything.