'How I Met Your Mother' Season 8: 6 things you should know about 'Farhampton'

"How I Met Your Mother" begins its eighth (and final?) season Monday night (Sept. 24) with yet another trip "a little ways down the road" to Barney and Robin's wedding day -- but also a pretty meaty story in the present. Here are a few things to watch out for when the CBS comedy heads to "Farhampton."

Don't get too pumped for the RoBarn nuptials. If you've watched the preview clips of Robin's (Cobie Smulders) and Barney's (Neil Patrick Harris) respective pre-wedding jitters, you've seen most of what the episode has to offer re: the big day. It's still a bigger look than we've received in the past, though.

Ted and Victoria, together again. Aside from the flash-forward, the show picks up pretty much where Season 7 ended, particularly with regard to Ted (Josh Radnor) and Victoria (Ashley Williams), who left her fiance at the altar on her wedding day. Radnor and Williams continue to have fine chemistry together, and even though we know it's not meant to be, Victoria remains the most interesting of Ted's exes -- at least those not named Robin.

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Brush up on your German. You'll also meet Victoria's would-be groom, Klaus (guest star Thomas Lennon), who runs into Ted a couple of times as he attempts to leave a note from Victoria explaining why she ran out. He also offers Ted some words of wisdom -- who knew Germans were such romantics?

Marvin Waitforit Eriksen is adorable. As you might expect. He's also, apparently, not letting his parents Marshall (Jason Segel) and Lily (Alyson Hannigan) sleep very much, and their delirious state gives "Farhampton" most of its best comedy moments. The show also comes up with a pretty ingenious visual device to illustrate how hard it is for the new parents to focus.

Barney gets history wrong. You may have seen this clip of Barney explaining to Quinn (Becki Newton) the entire history of "How I Met Your Mother" in under 60 seconds. Except for one thing -- midway through his breathless recap, Barney mentions that Robin moves to Brazil when, as we all know, she went to Argentina after she and Ted broke up at the end of Season 2. As continuity-obsessed as creators Carter Bays and Craig Thomas (who wrote the episode) are, we have to think they did that on purpose, but it goes uncommented on in the episode itself.

Stick around to the very end. Something important happens.

"How I Met Your Mother" airs at 8 p.m. ET Monday on CBS.