In the March episode, Ted is smitten by Underwood's Tiffany, but is cautious when she touches another guy's foot.
The official promo pictures of Carrie Underwood on "How I Met Your Mother" have been released. Unlike the one released by Neil Patrick Harris on his Twitter which shows the singer as a flight attendant, these bunch of new ones mostly show her scenes with Josh Radnor's Ted.
The episode is called "Hooked" and it will air on March 1. When the gang tries to convince Ted that he is being strung along by Tiffany, they reflect about relationships where each of them has been in the same situation.
"The show was so much fun!" Underwood wrote on her blog about the shooting. "I got to hang out with the whole cast, dress up like a flight attendant, play a cavewoman, and had a baby pig poop on me ...jealous?" She also complimented the cast, "The entire cast made me feel right at home and were super patient and great with me and my lack of experience."