Ep 14. The Possimpible

In season 4 episode 14 of How I Met Your Mother, entitled “The Possimpible”, Robin introduces the gang to her new boyfriend, Don. However, things quickly become awkward when Barney tries to convince Robin that Don is completely made up, as he claims that "possimpible" is the most legendary scam in the playbook.

Barney's evidence is rather convincing, and as the episode goes on, the gang becomes more and more convinced that Don isn't real. However, Robin is adamant that Don is very much a real person and even sets up a double date with Ted and a friend of Don’s, hoping to prove her point.

The date starts off rocky, with Ted’s date being completely uninterested in him and Don appearing to be rather dull. But things take a turn when Don reveals that he has a talking parrot. Throughout the episode, Barney insists that the talking parrot is Don in disguise, but the gang is still skeptical.

As the night goes on, the gang's suspicion of Don grows and they start to dig deeper into his life. However, Robin continues to defend him, and the more she talks about him, the more she starts to realize that she doesn't actually know much about him.

The gang’s investigation culminates in a hilarious scene where they break into Don's apartment to try and uncover the truth. However, they find no evidence of Don’s existence and end up getting caught in the act by Don himself.

In the end, Robin and Don have a heart-to-heart, where Don reveals that he has been purposefully low-key about his life because he doesn't want to scare her away. Robin realizes that she doesn't need to know every detail about Don's life to enjoy being with him, and the two reconcile.

Overall, season 4 episode 14 of How I Met Your Mother is hilarious, filled with classic HIMYM humor and hijinks. The episode keeps you guessing until the very end, as the gang tries to figure out the truth about Don and Robin's relationship.