The CBS comedy "How I Met Your Mother" ends its nine-year-run Monday night (March 31), and through the years the series has featured several special guest stars. In 2010, the show gave country superstar Carrie Underwood her first-ever TV acting role as pharmaceutical rep Tiffany, who "hooks" show regular Ted, played by Josh Radnor. (Watch a behind-the-scenes video of the episode above.)
In the episode, Carrie dons a number of costumes to play women that the lecherous Barney (Neil Patrick Harris) flirts with, calling pharmaceutical reps (pharma girls) the "hot chick" profession of the moment and flashing back to other "hot girl" types of the past. This gives Carrie a chance to play a flight attendant, a cave girl and a nurse. A year later, she would make her film debut in the drama "Soul Surfer" and in 2013, she would play Maria in NBC's "The Sound of Music."
Carrie's "Hooked" episode of "HIMYM" was the second-highest rated of the series' fifth season. The legen- ... wait for it ... dary one-hour finale of "How I Met Your Mother" airs Monday at 8:00 PM ET on CBS.