After Jeanette dumps Ted, Barney has some good news for him - he still has a copy of his playbook and will help Ted make some plays to seduce a new girl.
Marshall resigns from GNB to volunteer for the environment, much to Lily and Barney's dismay. Ted and Zoey have conflicting views on the Arcadian's future.
Barney finally meets his dad (played by John Lithgow); and the pals think of things they should all know by now as adults, but don't.
Realizing he has heartfelt affection for Nora, Barney believes something is wrong with him.
Marshall becomes obsessed with saving the environment after seeing a film about garbage, while Robin makes Barney confront his feelings for the woman who was his first Valentine's Day date.
Barney calls Feb. 13 "Desperation Day," a holiday for desperate women while Ted and Zoey try to figure out their relationship.
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