Lies and the lengths we'll go to sustain them took center stage on last night's episode of How I Met Your Mother, "Zoo or False."

In "Say Cheese", it is Lily's birthday and history repeats itself when Ted brings another random girl to one of their group only functions. Read our full recap to find out what happened!

In "Of Course", Robin consults a self-help guru to help resolve her anger towards Barney, mostly based on his behavior during their break-up. Read our recap to find out what happened!

In "Hooked", Carrie Underwood guest stars as Tiffany - a girl that has Ted hooked. The gang get together to discuss this and their own hooked situations. Read our recap to find out what you missed!

In "Rabbit or Duck", Marshall and Lily set up Ted with one of Barney's discards this week. While Robin is invited to a party by her co-worker Don.

This week's episode is titled "The Perfect Week." During it, Barney is encouraged to date seven girls in seven days - creating the "Perfect Week". Jim Nantz and Nick Swisher guest star.

When Lily refuses to believe that Jenkins, Marshall's attractive female colleague, kissed him, Marshall insists Jenkins tell Lily what really happened.

Barney has to give up suits to land a hot bartender, Karina (Stacy Keibler), which leads to a musical number for the 100th episode.

Find out how the How I Met Your Mother gang quit smoking our in review of "Last Cigarette Ever."

Read our review of this week's HIMYM episode, "The Window," which guest starred Joanna Garcia.

Check out our review of this week's Thanksgiving How I Met Your Mother, "Slapsgiving 2: Revenge of the Slap."

We loved "The Playbook" because it was classic Barney on How I Met Your Mother.

Find out why we still loved the least funny, most depressing How I Met Your Mother of the season, "Rough Patch."

Find out why "Bagpipes" was a classic How I Met Your Mother episode... without any of that mother stuff.

Find out what happened when Robin almost got deported in our How I Met Your Mother review of "Duel Citizenship."

Find out why Ted was "The Sexless Innkeeper" in our How I Met Your Mother recap.

Find out what happened when Barney enrolls in "Robin 101" in our How I Met Your Mother recap.

On last night's How I Met Your Mother, Barney, Marshall, Robin and Lily went on a Double Date, check out our recap of it!

Find out how Barney and Robin defined their relationship in our How I Met Your Mother recap of "Definitions."