Kate and Toby were at the center of This Is Us Season 4 Episode 2.

And so was their son, Jack, which is where the problems between the couple arose.

We'll start with this:

A clearly thinner Toby simply could not hide his anxiety over the baby boy’s diagnosis of blindness on this installment of the NBC drama.

The family remarked on Toby's weight loss, which he attributed to stress and stress only.

Kate, for her part, appeared to be holding things together and also appeared to be unshaken by any new developments.

The husband and wife did get plenty support from Kevin, Rebecca, Miguel and Madison as they navigated the ins and outs of parenting a child who cannot see.

Kate eventually lost it when she thought about Jack never getting to see a Pittsburgh Steelers game -- and she wondered whether his condition was her fault because doctors warned her not to get pregnant.

However, she regained her inner strength once she decided that he would live a limitless life... with the Pearsons’ assistance.

She was still struggling, though. Could anyone blame her?

Toby noted that Kate was overeating to cope and that he was worried about her, while he was secretly sneaking to the gym to work out and slim down.

Elsewhere...

Kevin also attempted to remain busy to maintain his sobriety.

He helped Kate and Toby... went to Alcoholics Anonymous meetings... wrapped a new film with M. Night Shyamalan ... and considered a job offer in Chicago.

However, he could not stop thinking about Nicky (Griffin Dunne), who totally ghosted him after Kevin wired him bail money.

Instead of heading to Illinois to take a meeting about a new movie, Kevin traveled to Nicky’s trailer to figure out what was up with him.

Watch This Is Us Season 4 Episode 2 Online

Nearby, Randall, Beth and the girls settled into life in Pittsburgh.

Tess (Eris Baker) and Deja (Lyric Ross) wanted to express their independence, naturally, by getting a kinda crazy haircut and riding the city bus to school alone, respectively -- but their parents hesitated.

Ultimately, they caved as viewers discovered that Deja’s route passed by Malik’s auto shop and she had been flirting with him via text message.

Finally...

In flashbacks, Jack, Rebecca and the Big Three went to the pool, yet it was nothing like their Season 1 trip. Unfortunately.

The children were about to begin seventh grade and were not into hanging with their mom and dad.

Kevin and Randall argued over their less than brotherly treatment of each other... and Kate kissed a boy after falling prey to a prank by popular girls.

This Is Us airs on NBC Tuesdays at 9/8c.