`How I Met Your Mother` future episode to be in rhyme

New York: An entire episode of `How I Met Your Mother` has been filmed in rhyme.

Cobie Smulders, who plays Robin in the CBS sitcom, revealed that comedy show`s writers created a story with constant rhyming by the characters, reported Huffington Post. "We just shot an episode where the entire thing is in rhyme. And it was so much fun. It`s like every second line is a rhyme. It varies; you gotta watch it!" Smulders said. "The writers just nailed it. It`s so fun and they just made it so funny, but so lyrical at the same time," she added. Smulders did not say when the said episode will be aired. The show starring Neil Patrick Harris, Jason Segel, Alyson Hannigan and others, is currently in its ninth and final season but CBS is exploring the option of a spin-off series.