VIDEO: Sneak Peek - Cristin Milioti Stars on Tonight's HOW I MET YOUR MOTHER

On tonight's episode of CBS's How I Met Your Mother entitled 'Rally,' when Barney suffers from the world's worst hangover the morning of his wedding, the gang tries to figure out the far-fetched ingredients to concoct the Stinson Hangover Fixer Elixir.

The episode, featuring Broadway vet and Tony nominee Cristin Milioti, airs tonight Monday, Feb. 24 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Get a sneak peek below!

HOW I MET YOUR MOTHER, now in its ninth and final season, is a comedy about Ted and how he fell in love. This season takes place over the course of Barney and Robin's wedding weekend, when the lives of the gang change dramatically. Ted is about to move to Chicago, Marshall and Lily are about to move to Rome, and Robin and Barney are about to become husband and wife. The series is narrated through flashbacks from the future.