Agents of S.H.I.E.L.D., Season 6

Deke:
When the monoliths exploded, it opened this Fear Dimension. I fought a Kree, and I saw my mother, which was horrible, and you got married in a forest a few floors down. That was nice. The other you.

Fitz:
It actually manifested living things? Flesh and blood?

May:
Yes. Coulson went in, sealed it up.

Fitz:
Maybe it wasn't a dimension. Izel said the monoliths had the power to create. Now, we know that one monolith was "space", another was "time". What if the third one was "creation"?

May:
That's where our fears came from?

Fitz:
Yeah, think about it. The physical stones blew apart. That doesn't... It doesn't mean...

Deke:
...Doesn't mean that the energy went away. It could... The light could just be uncontained monolith energy.

Fitz:
Exactly. Exactly. We're looking for a link. That could be it.

May:
O-Okay, so you're saying that, when Coulson went in there with it...

Fitz:
It's possible that the three energies combined to create another Coulson through space and time on some other planet years ago. And he was left there when our Coulson sealed the Gravitonium device.

May:
If that's true, he doesn't know it.

Deke:
Just saying, the other you thought it was a Fear Dimension.

Fitz:
Yeah, well, he wasn't the smart one.