Leigh started her acting journey in 1996 a few years before the show’s time travel elements occur.

Can you see “The Way Home” reaching that hefty milestone?

Sorry to cut you off …

Chyler Leigh smiling

I just needed to go ahead and give you a “yes.”

What is the most rewarding aspect of sticking with a show for that long?

Watching the evolution of characters.

Kat and Del arguing in The Way Home

We get to go back to 1999. Who knows where else anybody might go?

There’s always that.

A hundred episodes in for sure, we got it.

Chyler Leigh as Kat looking irritated in The Way Home

This is your first project since playing Alex Danvers.

What was that transition like from playing a character for six seasons to starting “The Way Home”?

Well, the characters are quite different.

I’m not killing any aliens in this show.

We do have time travel, so those still line up.

But it’s always to take rest into [it] … Those characters never go away.

They’re always going to be in people’s hearts.

They’re always going to be in my heart, so it’s letting that live on and breathe.

You’ve always got Netflix nowadays, or whatever other streaming [platform], or the Hallmark Channel.

The sci-fi aspects of “The Way Home” do sort of emulate “Supergirl” as well.

Did that show help you prepare at all for this one?

We’ve moved on.

It’s more magical like mystery and intrigue in figuring out how [it works].

That’s what’s going to be fun about the journey figuring out where this whole story originated.

We’re excited about that.

You even played a queer character [on “Supergirl”].

It means absolutely everything.

“The Way Home” premieres on Hallmark on Sunday, January 15 at 9 p.m. ET/8 p.m. CT.

This interview has been edited for clarity.