SynopsisTed starts his first day as an architecture professor, standing in the middle of a classroom in which the mother was present, but it turns out not to be the architecture class he is supposed to teach, instead he is in an economics class. Barney and Robin have had a sexual relationship throughout the summer, but are not ready to label their relationship. However, Lily locks them in a room, forcing them to come to terms with their relationship. They date for a few weeks, but after a rough patch, they decide to break up. Robin describes it instead as "two friends getting back together." Barney immediately goes back to his old ways, using the playbook to score with women. Marshall uses his fourth slap on Barney. Ted dates a graduate student named Cindy (Rachel Bilson) and it is revealed that her roommate is his future wife.
Robin gets a new co-anchor on her show Come On, Get Up New York!, named Don. Although Robin initially dislikes him due to his unprofessional manner, the two start dating, and Robin later moves in with him. Robin later get a call from WNKW in Chicago, offering her the anchor job. Robin turns it down, keeping her relationship with Don ahead of her career, but is devastated when Don tells her that he took the same job.
Lily and Marshall are unsure about having a baby, and they decide that they will start trying when they spot the fifth (Barney's) doppelganger. They finally spot Barney's doppelganger, as a brunette cab driver, and decide to start trying to have a baby. It turns out that the cab driver was actually Barney, and he had worn the disguise to try to pick up women. When Marshall finds this out, he decides not to tell Lily, fearing she will want to wait even longer to have children. Lily eventually finds out and decides to wait. A few months later, Lily thinks she has spotted Barney's doppelganger as a hot dog vendor, which causes the group to realize she is seeing what she wants to see, and play along. They then tell Marshall that she is ready to have a baby.
Episode List: 2009 - 2010
|The gang uncover Barney and Robin's recent romance and Lily forces them to "define the relationship". Ted must decide what kind of professor he is going to be.|
|Ted has a blind date, and discovers its the same date he was on seven years ago. They retrace their steps from their first date to see where they went wrong. Meanwhile, Marshall and Barney go to a strip club and find a stripper who looks exactly like Lily.|
|Robin thinks Barney is cheating on her, but instead he's been taking "Robin 101" classes from Ted. Meanwhile, Marshall tries to give away his barrel, but is upset that no one seems to want it.|
|The Sexless Innkeeper||5x04|
|Barney tells Ted he's been used after a girl stays over but doesn't have sex with Ted. Barney and Robin suffer through an awkward "couple's night" with Marshall and Lily.|
|Robin faces deportation so Barney decides to help her become an American citizen. Ted and Marshall go a road trip to relive their college days but Marshall invites Lily along.|
|Lily and Marshall have relationship problems, while Ted tries to determine if Barney and Robin's relationship is really going as well as it appears.|
|The Rough Patch||5x07|
|Robin and Barney's relationship is tearing them apart so Ted and Marshall get Lily to help break them up.|
|Barney dusts off his playbook filled with strategies on how to pick up women and Lily seeks to put a stop to it. Ted and Marshall insist Robin is about to fall in love.|
|Slapsgiving 2: Revenge of the Slap||5x09|
|Thanksgiving 2009: After being granted the 'fourth slap' from Marshall, Ted and Robin Argue over who deserves it most. Meanwhile, Lily struggles to forgive her distant father after he arrives unexpectedly.|
|Ted finds out a girl he likes is finally single. The gang must keep her single long enough to seal the deal. Barney tries to pick up a girl wearing overalls and Marshall deals with a letter from himself.|
|Last Cigarette Ever||5x11|
|Marshall restarts smoking to relate with his boss. The rest of the gang join him and then try to stop. Robin has to deal with an unprofessional co-anchor, Don.|
|Girls Versus Suits|
|Barney must abandon suits to sleep with a hot bartender. Ted gets closer than ever to The Mother.|
|Lily doesn't react the way Marshall would expect when she is introduced to a female coworker. Ted's students use Robin's morning show as a drinking game.|
|Barney tries to land the perfect week: seven women in seven days. Meanwhile, the rest of the gang are all having a terrible week.|
|Rabbit or Duck|
|Robin can't decide if she likes Don. Barney gets a "magical" cell phone that doesn't stop ringing. Ted asks Marshall and Lily to set him up for Valentine's Day.
Ted is at MacLaren's telling the gang about this woman, Tiffany. She says she's really into him, but can't be with him "right now." The gang sees through her ruse, telling Ted that he's been "hooked," a euphemism for stringing someone along until they meet someone better.
Everyone has an example: Marshall did a high school classmate's homework and was her "secret boyfriend", Robin allows her pre-morning show cameraman to pamper her, and Lily's high school flame, Scooter (David Burtka), works at her school as cafeteria staff, where she doesn't exactly tell him that a romantic relationship is impossible.
Ted refuses to believe that he has been hooked, and continues waiting for Tiffany. When she shows up to the bar with her co-workers, Barney is excited to see that she and all her friends are pharmaceutical representatives, which he calls the "hot-chick" profession of their generation (like the nurse or stewardess was in the past).
All the while, Ted himself has "hooked" Henrietta, a librarian from Columbia. Henrietta treats Ted just like he treats Tiffany, even assembling an elegant dinner when he drops by. Ted is just as dismissive of Henrietta as Tiffany is of him. Ted is invited to go to a wedding with Tiffany, which he sees as a sign of commitment, so he meets her in the room with champagne. However she enters with the best man, the guy who has "hooked" her. Ted leaves, intent on making sure Henrietta doesn't feel the same heartbreak.
Unfortunately, he took the best man's jacket by accident, which had the wedding ring inside. Bending over at Henrietta's door to tie his shoes, the ring falls out, and Henrietta opens the door to see Ted down on his knee, in a tuxedo, with a ring in his hand. She says yes, and introduces him to her visiting parents. Ted explains what has happened and that they will never be together.
Meanwhile, Marshall tries to get Lily to let Scooter know she is never going to be with him, but she is immobilized by Scooter's puppy-dog eyes. Marshall uses Barney's teacup pig (in a cute blanket) to train Lily to resist Scooter. Eventually, it works, and the two head down to the cafeteria, but even though Lily is able to tell Scooter it will never happen, Marshall himself can't resist Scooter's charm, telling him to just wait until he is dead.
|Barney tries to sleep with a woman who wrote a book on how to avoid men like Barney. The gang learns that Robin is still taking her break up with Barney hard. Robin deals with her newly realized feelings for Don.|
|Marshall has planned an intimate party for Lily's 32nd birthday. But things get awkward when Ted shows up with a date. Meanwhile, Robin tries to get a bad picture of Barney.|
|Zoo or False||5x19|
|Marshall comes up with a number of different outrageous and embarrassing stories to explain how he was mugged in Central Park, but which of his stories is the truth?|
|Ted reacts to his mother's second marriage by buying a house. Barney makes fun of Robin for crying at the wedding.|
|Don and Robin plan to move in together, prompting Ted and Barney to realize neither is over Robin yet. Marshall and Lily realize they enjoy sleeping in separate beds.|
|Robots Versus Wrestlers||5x22|
|While Barney, Lily and Marshall watch a Robots vs. Wrestlers event, Ted attends a sophisticated kind of party. Robin continues avoiding the group to build a better relationship with Don.|
|The Wedding Bride||5x23|
|Tony's movie, The Wedding Bride, is released. It turns out to be based entirely around the wedding between Ted and Stella and Tony's involvement. However, in the movie, Ted is a villian and Tony is a hero. The gang all see the movie and reflect upon it.|
|Marshall and Lily spot Barney's doppelganger, fulfilling the requirements they set to start trying to have a baby. Robin is offered a better job in Chicago, and is in a dilemma about what to do.|
|How I Met Your Mother Seasons|