S06E11How I Met Your Mother · Season 6
How I Met Your Mother season 6 episode 11: The Mermaid Theory
Aired 6 December 201023 minRated TV-14
Where to watch How I Met Your Mother Season 6 in Australia
How I Met Your Mother season 6 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 $22.99.
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Availability checked 16 November 2026.
What happens in “The Mermaid Theory”
When Ted's new friendship with Zoey tests the theory that single men and married women can't be friends, he invites her husband, "The Captain," to hang out with them. Meanwhile, Marshall and Robin decide to spend alone time together, and Barney and Lily possibly have a fight.
Episode summary: TMDB.
Before you watch
- It is episode 11 of 24 of season 6, so watch episodes 1 to 10 first.
- It runs about 23 minutes.
- Directed by Pamela Fryman, written by Robia Rashid.
- TMDB users rate it 7.7 out of 10 (37 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
- Writer
- Robia Rashid
- Guest stars
- Jennifer Morrison as Zoey PiersonKyle MacLachlan as George Van SmootTamara Lynn Davis as IrisAngus McClelland as AngusLyndsy Fonseca as DaughterDavid Henrie as Son
Credits: TMDB.
More from How I Met Your Mother Season 6
Every episode of Season 6How 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.