PICS: A Look Back at 'How I Met Your Mother'

How I Met Your Mother is wrapping up its successful nine-year run and Ted is finally going to finish telling his two children the story of how he met their mother!  Click through the gallery for a look back at some memorable moments from the show's nine seasons.  The one-hour season finale airs tonight at 8 p.m. ET/PT on CBS.

Season one: In an attempt to repair his situation with Robin (Cobie Smulders), Ted (Josh Radnor) instead pursues a "casual" relationship with her by inviting her to a series of parties. Marshall (Jason Segel) tries to write an important 25-page law paper, but Ted's parties and Lily's (Alyson Hannigan) post-engagement desire distracts him. Meanwhile, Barney (Neil Patrick Harris) tries to end a relationship he unknowingly started.

Season two: Barney and Marshall 'hunt' his 'cougar' law professor (guest star Jane Seymour).

Season three: When Barney loses his 'mojo,' he attends the Victoria's Secret Fall Fashion Show after-party where he, Marshall (Jason Segel), and Ted mingle with the lovely supermodels, including guest star Heidi Klum.

Season four: The whole gang, along with guest star Regis Philbin, sets out on a mission to find the restaurant where Marshall (Neil Patrick Harris) ate his first New York burger.

Season five: The cast performs the musical number Girls Vs. Suits in the show's 100th episode.

Season six: Zoey (Jennifer Morrison) sits in at Ted's class and gets his students on her side of the fight to save the hotel being torn down for the new GNB headquarters. Ted, Marshall, and Barney see Robin in a Halloween 'parade' and Marshall has problems with his assistant, Randy, and how GNB treats people.

Season seven: While Barney prepares for his wedding, he and Ted reminisce about Punchy's wedding, which was ruined due to Marshall's drunk antics. Robin considers telling Barney she has feelings for him until Barney receives a call from Nora.

Season eight: Robin (Cobie Smulders) tries to locate the locket that she buried in Central Park (when she visited at 15 years old) to wear as her 'Something Old' for the wedding. Meanwhile, Marshall and Lily ask Ted to help them pack for Italy and Barney invites Robin's father to play Laser Tag in order to bond with him.

Season nine: Lily (Alyson Hannigan) is the first of the gang to officially meet "The Mother" (Cristin Milioti) in the ninth and final season premiere of How I Met Your Mother.

Season nine: The wedding weekend is here! Robin (Cobie Smulders), Barney (Neil Patrick Harris), James (Wayne Brady), and Ted (Josh Radnor) share a toast before the chaos begins.

Season nine: Two years in the future, Ted (Josh Radnor) asks "The Mother" (Cristin Milioti) to marry him and she says yes.

Season nine: Barney surprises Robin with a Canadian-themed wedding rehearsal dinner extravaganza!

Season nine: In an attempt to deliver a devastating final slap to Barney, Marshall explains how he mastered the 'Slap of A Million Exploding Suns'. 

Season nine: In the 200th episode, we learn what 'The Mother' (Cristin Milioti) has been up to over the past eight years, leading up to the wedding weekend where she will meet her future husband, Ted (Josh Radnor).  Actress Rachel Bilson guest stars as Cindy.

Season nine: When Barney suffers from the world's worst hangover the morning of his wedding, the gang tries to figure out the far-fetched ingredients to concoct the 'Stinson Hangover Fixer Elixir'.

Season nine: With only half an hour to go, both Barney and Robin have panic attacks about their upcoming nuptials. Meanwhile, Marshall and Lily rewrite their old wedding vows.

How's that for a final high five?  Ted finally finishes telling his kids the story of how he met their mother, on the special one-hour series finale airing Monday, March 31 at 8 p.m. ET/PT on CBS.