'How I Met Your Mother' Adds Slew of Canadian Guest Stars for 'Robin Sparkles' Episode

The CBS comedy baits the return of Cobie Smulders' pop star alter ego with appearances from Alan Thicke, James Van Der Beek and Alex Trebek -- among others.
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How I Met Your Mother is bringing back some noteworthy guest stars and characters with the Feb. 4 episode, as the CBS comedy teased in a viral clip released Monday.

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Famous Canadians Alan Thicke, James Van Der Beek, Paul Shaffer, Jason Priestley, Alex Trebek, K.D. Lang and Luc Robitaille will appear in the episode "P.S. I Love You," which, according to the clip, also heralds the return of Robin Sparkles.

The alter ego of Robin Scherbatsky (Cobie Smulders) had a brief cameo on the show this season, though she's only appeared in three fully-realized montages since her Robin's musical past was revealed in the 2006 episode "Slap Bet."

Thicke and Van Der Beek aren't strangers to How I Met Your Mother, both appearing in previous Robin Sparkles plot twists. Trebek has also appeared as himself. Shaffer, Priestley, Lang and Robitaille are all first-timers on the show.

How I Met Your Mother is expected to officially announced a pickup for a ninth and final season sometime in January.