Two young men plotting to disrupt a political convention are interrupted by nerves, and an AC repairman.

When Tina and Gemma get more than they bargained for in a revealing art class, Calvin can’t hide his jealousy and takes drastic action. Also, Dave, Marty and Malcolm team…

Barney meets his father and is shocked by the differences in their lives. The rest of the gang learn their “gaps”; knowledge they should have by now, but don’t.

When Zoey enrolls in Ted’s class, she manipulates his students into taking her side in the fight to save the building being torn down to make room for his project….

When Lily refuses to believe that Jenkins, Marshall’s attractive female colleague, kissed him, Marshall insists Jenkins tell Lily what really happened. Meanwhile, Robin finds out that a drinking game has…

When a perfect girl finally shows up, the gang tries everything to help Ted, while Marshall takes action when he discovers a letter written by younger himself.