Flashback Marshall is with McLaren's Lily's father. Lily: The slaps are transferable. Ted (2030): Children Remember the slap bet to Marshall and Barney. Ted (2030): It was someone with whom Lily had had no contact in three years. Ted and Robin hug. You come to Thanksgiving!
Plan: A: The gang; Q: Who celebrates Thanksgiving with Lily's estranged father? A: Lily's estranged father; Q: Who does the gang celebrate Thanksgiving with this year? A: Chris Elliott; Q: Who is Lily's father? A: three years; Q: How long had Lily not spoken to her father? A: the chance; Q: What are Ted and Robin given to use Marshall's fourth Slap Bet slap on Barney? Summary: The gang celebrates Thanksgiving this year with Lily's estranged father ( Chris Elliott ) whom she hadn't spoken to in three years. Ted and Robin are given the chance to use Marshall's fourth Slap Bet slap on Barney.