Season 6 Episode 19 - Legendaddy
Barney and his father, Jerry Whitiker, meet for the first time as father and son. The rest of the gang are struggling with certain issues.

Season 6 Episode 18 - A Change of Heart
Barney realizes he has heartfelt attraction for Nora and he thinks that something is wrong with him. Robin dates a guy who acts like a dog.

Season 6 Episode 17 - Garabage Island
Marshall becomes obsessed with saving the environment after seeing a documentary on garbage. Ted runs into The Captain, Barney admits he has feelings for a woman.

Season 6 Episode 16 - Desperation Day
The gang tries to finalize their plans for Valentine's Day with less than 24 hours to go. Lily faces the prospect of spending the day without Marshall.

Season 6 Episode 15 - Oh Honey
Barney opens up about himself to a woman named Honey (Katy Perry), who turns out to be Zoey's cousin. Ted, whom Zoey is pairing up with Honey, admits to having feelings for Zoey to the group.

Season 6 Episode 14 - Last Words
The gang consoles Marshall as he returns to Minnesota upon learning of his bad news. He also comes to grips with an old nemesis.

Season 6 Episode 13 - Bad News
When Marshall and Lily fear they will never get pregnant, they see a specialist who can hopefully help move the process along while Marshall's parents pay him a surprise visit at a less than opportune time.

Season 6 Episode 12 - False Positive
After hearing startling news, everyone must reflect on their lives. Robin becomes newly employed and Ted must do a few things because he is Punchy's Best Man. Meanwhile, Barney tries to get into the Christmas spirit.