“It hasn’t gone the way that he wanted it to go.

It becomes his new reality.

It’s not something that he would’ve written and wanted to go that way.

This Is Us

Justin Hartley on ‘This Is Us’.Ron Batzdorff/NBC

It’s not a storybook or a fairy tale, but it’s his reality.

And he’s dealing with it.

He looks at things and he goes, ‘This is the way it is.

I’m not going to sit around and bitch about it.

I’m going to actually figure it out.'”

To that end, season 6 dangles professional possibilities and requires tough decisions.

“He’s got these career opportunities, but does he take them?”

“That will take him away from his kids.

Or does he sacrifice that?

What’s more important?

Where does he want to be?

He’s got to jump into a lane.

Right now he’s kind of straddling.”

“There’s a lot of drama,” he says.

Where you saw these characters going and their relationships going it is unbelievable how quickly things change.

You go, ‘Gosh, It’s hard to remember when those two didn’t get along.'"

“Mom’s sick.

It’s heartbreaking to see stuff like that.

It’s like, beloved character, America’s mom, adios!

It’s a tough one.”

Planning care for an Alzheimer’s patient is often overwhelming for a family.

(See: Kevin and Randall at the end of season 4.)

How will the Big Three respond as her condition worsens?

“They’re all willing and wanting to help out,” he says.

They’re at a place now where they understand it.

It’s better to tackle it as a group."

Speaking of being better together than apart, Kevin is single again.

And then there were people that probably just want him to be the Manny."

Is Kevin determined to find the one, much like Jack (Milo Ventimiglia) did?

Or will he find a path less traveled to happiness on different terms?

“He’s okay being alone.

He’s not lonely; he’s alone.

That’s totally different.

And I think that opens him to love.”

And as he starts to open up, what new sides of Kevin will viewers see?

“Maybe how romantic he is,” teases Hartley.

Says Hartley: “New level.”

Welcome to the final level ofThis Is Us, which begins Tuesday at 9 p.m. ET/PT.

For a preview of the upcomingThis Is Usaction,see what hints that Chrissy Metz dropped.

Creator Dan Fogelmanoutlined the season here.

Oh, and readwhat Mandy Moore and Jon Huertas had to say.

Plus, check outwhat Sterling K. Brown and Susan Kelechi Watson revealed.

There’s also intel fromnewcomer Chris Geere, a.k.a.