Barney shares his pre-nup demands with Quinn on How I Met Your Mother. "The Pre-Nup" is the second episode of the show's eighth season.

Calm down, Barney! The groom is freaking out a bit in this first look at the How I Met Your Mother season premiere.

Don't shoot! It's Barney Stinson! That guy cracks us up.

Welcome, baby Eriksen! This is a scene from the How I Met Your Mother finale.

Barney performs a magic trick in this scene from the How I Met Your Mother season seven finale.

This photo says it all, doesn't it? We have a new member of the How I Met Your Mother family.

He's a father! The gang celebrates with new father Marshall in this How I Met Your Mother season finale scene.

Barney, Ted and Robin are at the hospital here for a very exciting reason: Lily is giving birth!

Barney looks more nervous than excited here, doesn't he? It's a legendary wedding day.

This is what friends are for: Barney takes Marshall on a road trip prior to his child being born.

Barney drags Ted out on the town every night as Ted gets used to living in his new apartment alone on this episode of How I Met Your Mother. "Now We're Even" is the 21st installment of season 7.

Barney is dressed like Julius Caesar here. He's also taking on ninjas.