The penultimate year of the CBS sitcom ends by making good on the promise it put forth from the start, introducing the mother-to-be of Ted's (Josh Radnor) children.

Before the show reaches that point, though, Lily and Marshall (Alyson Hannigan, Jason Segel) become parents and Barney (Neil Patrick Harris) makes his ultimate play for Robin (Cobie Smulders). Guest stars include Katy Perry, Mike Tyson, Ralph Macchio and Peter Gallagher. DVD extras: two "making-of" documentaries; audio commentary on selected episodes; deleted scenes; outtakes; music video. *** (Not rated: AS, P)

<a href=""><b>Buy 'How I Met Your Mother: The Complete Season 8 -- The Yellow Umbrella Edition'' on DVD</b></a>.