"How I Met Your Mother" stars (from left) Jason Segel, Alyson Hannigan, Cobie Smulders, Neil Patrick Harri, and Josh Radnor. The CBS show debuted in 2005. (CBS via Associated Press)
From left: Jason Segel, Alyson Hannigan, Neil Patrick Harris and Josh Radnor are shown in a scene from CBS's "How I Met Your Mother." (CBS via Associated Press)
In this undated publicity image released by CBS, from left, Jason Segel, Alyson Hannigan, Neil Patrick Harris, and Josh Radnor are shown in a scene from "How I Met Your Mother." (AP Photo/CBS, Ron P. Jaffe)
