S04E01How I Met Your Mother · Season 4
How I Met Your Mother season 4 episode 1: Do I Know You?
Aired 22 September 200823 minRated TV-14
Where to watch How I Met Your Mother Season 4 in Australia
How I Met Your Mother season 4 is streaming in Australia on Disney+ (subscription, listed for the whole show). You can also buy it on Apple TV from $24.99 and Prime Video Store from $24.99.
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Stream (subscription)
Stream Now on Disney+Disney+
Subscription · Listed for the whole show
From $9.99/mth
Buy or rent
Stream now on Apple TVApple TV
Buy
Buy from $24.99 a season
Rent or buy on Prime Video StorePrime Video Store
Buy
Buy from $24.99 a season
Availability checked 16 November 2026.
What happens in “Do I Know You?”
Ted and Stella get engaged, but Ted soon learns that he doesn't know anything about her. Meanwhile, Barney confesses to Lily that he's in love with Robin.
Episode summary: TMDB.
Before you watch
- It is the season premiere of season 4.
- It runs about 23 minutes.
- Directed by Pamela Fryman, written by Craig Thomas and Carter Bays.
- TMDB users rate it 8.2 out of 10 (39 votes).
How I Met Your Mother trailer
The official trailer for the series (no preview of this episode has been published).
Play video: How I Met Your Mother trailer
Cast and crew of this episode
- Director
- Pamela Fryman
- Writers
- Craig ThomasCarter Bays
- Guest stars
- Sarah Chalke as Stella ZinmanKyle Archer as Mark JohnsonHeidi Herschbach as AprilLyndsy Fonseca as DaughterDavid Henrie as SonNicole Taylor as Sexy Blonde
Credits: TMDB.
More from How I Met Your Mother Season 4
Every episode of Season 4How I Met Your Mother episode guide
Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.