"Perfect on Paper"
Katie Holmes guest stars as the Slutty Pumpkin, a Halloween dream girl from Ted' past.
"Legendaddy"
Barney finally admits to himself that Bob Barker is not his real father, and he spends quality time with his actual father, played by John Lithgow.
"Oh Honey"
Katy Perry plays a beautiful but dumb love interest for Barney named Honey.
"Bad News"
Marshall is convinced that Lily's OBGYN is actually Barney in disguise.
"The Magician's Code, Part Two"
Barney and Quinn are arrested by airport security when he refuses to open up a box they are traveling with, which is later revealed to contain an engagement ring for Quinn.
"Old King Clancy"
Robin tells the tale of how she hooked up with a Canadian celebrity when she was younger.
"Showdown"
Barney appears on The Price Is Right in an attempt to bond with who he thinks is his birth father, Bob Barker.
"Hooked"
Ted can't seem to seal the deal with a girl (Carrie Underwood) who constantly keeps him on the hook.

