1 Series, 4 Episodes
Ted's romantic luck is bolstered by his new relationship with Robin, who has yet to reveal her love of guns. However, Marshall is feeling down after his split from Lily.
Marshall has a string of ill-fated nights out with Barney in a bid to meet new women. He eventually goes on a date but bumps into Lily.
Ted and the gang have brunch with his parents. Robin worries that Ted's mum doesn't like her but realises that isn't the case when she reveals a huge secret.
Ted and Robin have their first big argument after Robin becomes annoyed at hearing Ted's work grumbles. Ted's pals try to prove that he's not dull.
Lily moves into Barney's flat to escape her rat-infested apartment. The two fall asleep in each other's arms but feel awkward when they wake up.
Barney seduces Marshall's professor in the hope that she'll give the class higher marks but she ends up grading Barney's performance in the bedroom.
Marshall goes on a date with waitress Chloe who accidentally calls Barney 'Swarley'. Lily stalks Marshall and Chloe but is found out. Will he take her back?
Lily and Marshall are ecstatic to be reunited and plan to elope to Atlantic City to escape the disapproval of their families.
Marshall, Ted and Barney are bamboozled by Robin's flat refusal to go to the mall, but they're willing to bet on why she hates it so much.
His closest friends and his brother James have all settled into relationships, and Barney is struggling to come to terms with this.
Lily hears an old message on Marshall's answering machine, leading to her falling out with Ted.
Robin's teenage sister Katie comes to stay. Robin discourages Katie from losing her virginity, which prompts the gang to recall their own experiences of the momentous occasion.
Ted struggles to fire his belittling former boss Hammond, who is now working for him. After Ted tries - and fails - to fire him three times, Hammond has a heart attack.
The gang plan to watch the Super Bowl together but are invited to a funeral on the same night. They come up with a creative solution to ensure they can keep both arrangements.
Ted is gutted when he misses a flight to Chicago for an interview at a prestigious architecture company. Annoyed, he tries to work out which of his friends is to blame for his lateness.
Lily is upset when Barney slates her performance in a terrible play. Ted and Robin fall out when they discuss what to do with 'stuff' left at their homes belonging to ex-boyfriends and girlfriends.
Marshall, Ted, Lily and Robin are upset when they learn that Marshall's trusty car is broken. The four of them reminisce about their adventures in it.
Barney steals Ted's removals van with his belongings in it when he discovers that he's moving in with Robin. He makes Ted complete challenges to get it back.
Marshall is fuming when Barney ruins the sedate stag do that Ted had organised by getting a stripper, and he considers asking him to stay away from the wedding
Lily and Marshall live apart for the fortnight before their wedding. Barney is ecstatic to appear as a contestant on The Price is Right.
When Marshall and Lily's plans for their dream wedding go awry, their friends save the day and give them the low-key ceremony they've been longing for.
At Marshall and Lily's wedding, Barney overhears Ted and Robin discussing a secret. He wheedles it out of them and discovers, to his dismay, that they have split up.