Houdini & Doyle (2016)

S5E9 Slapsgiving 2: Revenge of the Slap

Title: Slapsgiving 2: The Slap Strikes Back Plot: Barney panics when Marshall grants Ted and Robin a slap bet, sending him into a frenzy over the potential repercussions. At the same time, Lily's long-absent father makes an unexpected appearance during the Thanksgiving festivities, adding tension to the holiday gathering.