The Pearsons come together to celebrate Kate and Toby’s wedding. Wedding planners Kevin and Randall struggle to pull off the big day. Kate is flooded with memories of Jack. Deja…

Kate and Toby go to Las Vegas for their bachelor/bachelorette parties. Meanwhile, Jack and Rebecca celebrate their wedding anniversary.

Team Scorpion must stop a sabotaged runaway subway train with Paige and Ralph on board. Also, in his attempt to impress Happy, Toby has his first boxing match.