S04E01: 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.
Previous Episode 
Season 1
Pilot
S1E1 / 19 Sep 2005
Purple Giraffe
S1E2 / 26 Sep 2005
Sweet Taste of Liberty
S1E3 / 03 Oct 2005
Return of the Shirt
S1E4 / 10 Oct 2005
Okay Awesome
S1E5 / 17 Oct 2005
The Slutty Pumpkin
S1E6 / 24 Oct 2005
Matchmaker
S1E7 / 07 Nov 2005
The Duel
S1E8 / 14 Nov 2005
Belly Full of Turkey
S1E9 / 21 Nov 2005
The Pineapple Incident
S1E10 / 28 Nov 2005
The Limo
S1E11 / 19 Dec 2005
The Wedding
S1E12 / 09 Jan 2006
Drumroll, Please
S1E13 / 23 Jan 2006
Zip, Zip, Zip
S1E14 / 06 Feb 2006
Game Night
S1E15 / 27 Feb 2006
Cupcake
S1E16 / 06 Mar 2006
Life Among the Gorillas
S1E17 / 20 Mar 2006
Nothing Good Happens After 2 A.M.
S1E18 / 10 Apr 2006
Mary the Paralegal
S1E19 / 24 Apr 2006
Best Prom Ever
S1E20 / 01 May 2006
Milk
S1E21 / 08 May 2006
Come On
S1E22 / 15 May 2006
Season 2
Where Were We?
S2E1 / 18 Sep 2006
The Scorpion and the Toad
S2E2 / 25 Sep 2006
Brunch
S2E3 / 02 Oct 2006
Ted Mosby, Architect
S2E4 / 09 Oct 2006
World's Greatest Couple
S2E5 / 16 Oct 2006
Aldrin Justice
S2E6 / 23 Oct 2006
Swarley
S2E7 / 06 Nov 2006
Atlantic City
S2E8 / 13 Nov 2006
Slap Bet
S2E9 / 20 Nov 2006
Single Stamina
S2E10 / 27 Nov 2006
How Lily Stole Christmas
S2E11 / 11 Dec 2006
First Time in New York
S2E12 / 08 Jan 2007
Columns
S2E13 / 22 Jan 2007
Monday Night Football
S2E14 / 05 Feb 2007
Lucky Penny
S2E15 / 12 Feb 2007
Stuff
S2E16 / 19 Feb 2007
Arrivederci, Fiero
S2E17 / 26 Feb 2007
Moving Day
S2E18 / 19 Mar 2007
Bachelor Party
S2E19 / 09 Apr 2007
Showdown
S2E20 / 30 Apr 2007
Something Borrowed
S2E21 / 07 May 2007
Something Blue
S2E22 / 14 May 2007
Season 3
Wait for It
S3E1 / 24 Sep 2007
We're Not from Here
S3E2 / 01 Oct 2007
Third Wheel
S3E3 / 08 Oct 2007
Little Boys
S3E4 / 15 Oct 2007
How I Met Everyone Else
S3E5 / 22 Oct 2007
I'm Not That Guy
S3E6 / 29 Oct 2007
Dowisetrepla
S3E7 / 05 Nov 2007
Spoiler Alert
S3E8 / 12 Nov 2007
Slapsgiving
S3E9 / 19 Nov 2007
The Yips
S3E10 / 26 Nov 2007
The Platinum Rule
S3E11 / 10 Dec 2007
No Tomorrow
S3E12 / 17 Mar 2008
Ten Sessions
S3E13 / 24 Mar 2008
The Bracket
S3E14 / 31 Mar 2008
The Chain of Screaming
S3E15 / 14 Apr 2008
Sandcastles in the Sand
S3E16 / 21 Apr 2008
The Goat
S3E17 / 28 Apr 2008
Rebound Bro
S3E18 / 05 May 2008
Everything Must Go
S3E19 / 12 May 2008
Miracles
S3E20 / 19 May 2008
Season 4
Do I Know You?
S4E1 / 22 Sep 2008
The Best Burger in New York
S4E2 / 29 Sep 2008
I Heart NJ
S4E3 / 06 Oct 2008
Intervention
S4E4 / 13 Oct 2008
Shelter Island
S4E5 / 20 Oct 2008
Happily Ever After
S4E6 / 03 Nov 2008
Not a Father's Day
S4E7 / 10 Nov 2008
Woooo!
S4E8 / 17 Nov 2008
The Naked Man
S4E9 / 24 Nov 2008
The Fight
S4E10 / 08 Dec 2008
Little Minnesota
S4E11 / 15 Dec 2008
Benefits
S4E12 / 12 Jan 2009
Three Days of Snow
S4E13 / 19 Jan 2009
The Possimpible
S4E14 / 02 Feb 2009
The Stinsons
S4E15 / 02 Mar 2009
Sorry, Bro
S4E16 / 09 Mar 2009
The Front Porch
S4E17 / 16 Mar 2009
Old King Clancy
S4E18 / 23 Mar 2009
Murtaugh
S4E19 / 30 Mar 2009
Mosbius Designs
S4E20 / 13 Apr 2009
The Three Days Rule
S4E21 / 27 Apr 2009
Right Place, Right Time
S4E22 / 04 May 2009
As Fast as She Can
S4E23 / 11 May 2009
The Leap
S4E24 / 18 May 2009
Season 5
Definitions
S5E1 / 21 Sep 2009
Double Date
S5E2 / 28 Sep 2009
Robin 101
S5E3 / 05 Oct 2009
The Sexless Innkeeper
S5E4 / 12 Oct 2009
Duel Citizenship
S5E5 / 19 Oct 2009
Bagpipes
S5E6 / 02 Nov 2009
The Rough Patch
S5E7 / 09 Nov 2009
The Playbook
S5E8 / 16 Nov 2009
Slapsgiving 2: Revenge of the Slap
S5E9 / 23 Nov 2009
The Window
S5E10 / 07 Dec 2009
Last Cigarette Ever
S5E11 / 14 Dec 2009
Girls vs. Suits
S5E12 / 11 Jan 2010
Jenkins
S5E13 / 18 Jan 2010
Perfect Week
S5E14 / 01 Feb 2010
Rabbit or Duck
S5E15 / 08 Feb 2010
Hooked
S5E16 / 01 Mar 2010
Of Course
S5E17 / 08 Mar 2010
Say Cheese
S5E18 / 22 Mar 2010
Zoo or False
S5E19 / 12 Apr 2010
Home Wreckers
S5E20 / 19 Apr 2010
Twin Beds
S5E21 / 03 May 2010
Robots vs. Wrestlers
S5E22 / 10 May 2010
The Wedding Bride
S5E23 / 17 May 2010
Doppelgangers
S5E24 / 24 May 2010
Season 6
Big Days
S6E1 / 20 Sep 2010
Cleaning House
S6E2 / 27 Sep 2010
Unfinished
S6E3 / 04 Oct 2010
Subway Wars
S6E4 / 11 Oct 2010
Architect of Destruction
S6E5 / 18 Oct 2010
Baby Talk
S6E6 / 25 Oct 2010
Canning Randy
S6E7 / 01 Nov 2010
Natural History
S6E8 / 08 Nov 2010
Glitter
S6E9 / 15 Nov 2010
Blitzgiving
S6E10 / 22 Nov 2010
The Mermaid Theory
S6E11 / 06 Dec 2010
False Positive
S6E12 / 13 Dec 2010
Bad News
S6E13 / 03 Jan 2011
Last Words
S6E14 / 17 Jan 2011
Oh Honey
S6E15 / 07 Feb 2011
Desperation Day
S6E16 / 14 Feb 2011
Garbage Island
S6E17 / 21 Feb 2011
A Change of Heart
S6E18 / 28 Feb 2011
Legendaddy
S6E19 / 21 Mar 2011
The Exploding Meatball Sub
S6E20 / 11 Apr 2011
Hopeless
S6E21 / 18 Apr 2011
The Perfect Cocktail
S6E22 / 02 May 2011
Landmarks
S6E23 / 09 May 2011
Challenge Accepted
S6E24 / 16 May 2011
Season 7
The Best Man
S7E1 / 19 Sep 2011
The Naked Truth
S7E2 / 19 Sep 2011
Ducky Tie
S7E3 / 26 Sep 2011
The Stinson Missile Crisis
S7E4 / 03 Oct 2011
Field Trip
S7E5 / 10 Oct 2011
Mystery vs. History
S7E6 / 17 Oct 2011
Noretta
S7E7 / 24 Oct 2011
The Slutty Pumpkin Returns
S7E8 / 31 Oct 2011
Disaster Averted
S7E9 / 07 Nov 2011
Tick Tick Tick
S7E10 / 14 Nov 2011
The Rebound Girl
S7E11 / 21 Nov 2011
Symphony of Illumination
S7E12 / 05 Dec 2011
Tailgate
S7E13 / 02 Jan 2012
46 Minutes
S7E14 / 16 Jan 2012
The Burning Beekeeper
S7E15 / 06 Feb 2012
The Drunk Train
S7E16 / 13 Feb 2012
No Pressure
S7E17 / 20 Feb 2012
Karma
S7E18 / 27 Feb 2012
The Broath
S7E19 / 19 Mar 2012
Trilogy Time
S7E20 / 09 Apr 2012
Now We're Even
S7E21 / 16 Apr 2012
Good Crazy
S7E22 / 30 Apr 2012
The Magician's Code (1)
S7E23 / 14 May 2012
The Magician's Code (2)
S7E24 / 14 May 2012
Season 8
Farhampton
S8E1 / 24 Sep 2012
The Pre-Nup
S8E2 / 01 Oct 2012
Nannies
S8E3 / 08 Oct 2012
Who Wants to Be a Godparent?
S8E4 / 15 Oct 2012
The Autumn of Break-Ups
S8E5 / 05 Nov 2012
Splitsville
S8E6 / 12 Nov 2012
The Stamp Tramp
S8E7 / 19 Nov 2012
Twelve Horny Women
S8E8 / 26 Nov 2012
Lobster Crawl
S8E9 / 03 Dec 2012
The Over-Correction
S8E10 / 10 Dec 2012
The Final Page (1)
S8E11 / 17 Dec 2012
The Final Page (2)
S8E12 / 17 Dec 2012
Band or DJ?
S8E13 / 14 Jan 2013
Ring Up!
S8E14 / 21 Jan 2013
P.S. I Love You
S8E15 / 04 Feb 2013
Bad Crazy
S8E16 / 11 Feb 2013
The Ashtray
S8E17 / 18 Feb 2013
Weekend at Barney's
S8E18 / 25 Feb 2013
The Fortress
S8E19 / 18 Mar 2013
The Time Travelers
S8E20 / 25 Mar 2013
Romeward Bound
S8E21 / 15 Apr 2013
The Bro Mitzvah
S8E22 / 29 Apr 2013
Something Old
S8E23 / 06 May 2013
Something New
S8E24 / 13 May 2013
Season 9
The Locket
S9E1 / 23 Sep 2013
Coming Back
S9E2 / 23 Sep 2013
Last Time in New York
S9E3 / 30 Sep 2013
The Broken Code
S9E4 / 07 Oct 2013
The Poker Game
S9E5 / 14 Oct 2013
Knight Vision
S9E6 / 21 Oct 2013
No Questions Asked
S9E7 / 28 Oct 2013
The Lighthouse
S9E8 / 04 Nov 2013
Platonish
S9E9 / 11 Nov 2013
Mom and Dad
S9E10 / 18 Nov 2013
Bedtime Stories
S9E11 / 25 Nov 2013
The Rehearsal Dinner
S9E12 / 02 Dec 2013
Bass Player Wanted
S9E13 / 16 Dec 2013
Slapsgiving 3: Slappointment in Slapmarra
S9E14 / 13 Jan 2014
Unpause
S9E15 / 20 Jan 2014
How Your Mother Met Me
S9E16 / 27 Jan 2014
Sunrise
S9E17 / 03 Feb 2014
Rally
S9E18 / 24 Feb 2014
Vesuvius
S9E19 / 03 Mar 2014
Daisy
S9E20 / 10 Mar 2014
Gary Blauman
S9E21 / 17 Mar 2014
The End of the Aisle
S9E22 / 24 Mar 2014
Last Forever (1)
S9E23 / 31 Mar 2014
Last Forever (2)
S9E24 / 31 Mar 2014
Josh Radnor
Ted Mosby
Neil Patrick Harris
Barney Stinson
Jason Segel
Marshall Eriksen
Alyson Hannigan
Lily Aldrin
Cobie Smulders
Robin Scherbatsky
