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This Is Us Mega Buzz: What Happened to Jack?

We're going to find out soon!

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Megan Vick

This Is Us fans won't have to wait much longer for an answer to one of the show's central mysteries -- why Rebecca (Mandy Moore) and Jack (Milo Ventimiglia) are no longer married. And the answer will come from a surprising source.

On Tuesday's episode, Toby (Chris Sullivan) notices that Kate (Chrissy Metz) is acting strangely and uncovers yet another secret that she's been keeping from him. When she comes clean, viewers will understand why Jack and Rebecca split. The reveal will also definitively change Kate and Toby's relationship.

Superlatives

Here's what you may have missed this week! TV Guide's weekend editor breaks down the week's best, worst, and weirdest TV moments.

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Catch up on all this week's Mega Buzz!

In a flashback, we'll also find out how the twins were conceived, and what the heck Miguel (Jon Huertas) was doing there.

(As unlikely as it may seem, both revelations have to do with the family's devotion to the Pittsburgh Steelers.)

Crave scoop on your favorite TV shows? E-mail questions to mega_scoop@tvguide.com or drop us a line at Twitter.com/TVGuide.