The Marvel star stopped by EW’s Comic-Con video suite fresh off the studio’s massive Hall H panel.

And we’re able to show sort of their relationship that is seen behind the scenes."

You know like, what does he do to relax?

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Gizelle Hernandez for EW

Does he ever relax?

What are his hobbies, you know?

Does he have a family?

What is his backstory?

And they really do a deep dive into him and his life in this series."

Despite the extraterrestrial element, Smulders said the series has a bit of a darker, grittier tone.

“It is really human again, even though there are aliens in it.

We’re dealing with real human issues and dealing with trust.

Can I trust you?

Are you who you say you are?

And do you have my back?

It creates a lot of friction among the characters.

And also it’s a stressful environment.”

But, she added, “It’s been a lot of fun.”

Watch the video above for more from Smulders.