In a flashback episode, the gang ponders the future of the Ted, Robin and Barney love triangle. Meanwhile, Barney accepts a series of challenges from Lily and Robin, on the final season of HOW I MET YOUR MOTHER, Monday, Nov. 11 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Pictured: Cobie Smulders as Robin, Neil Patrick Harris as Barney, Alyson Hannigan as Lily. Photo: Richard Cartwright/FOX ©2013 FOX Television. All Rights Reserved.