Tune in for a very special Slapsgiving episode of 'How I Met Your Mother.' ...

Lily and Marshall host their first Thanksgiving and slapping Barney is the hot topic...

After Lily and her father begin to make a mends, Barney gets a big fat slap in the...

Ted explains why Lily has such a deep hatred for her dad

Marshall admits to inviting Lily's father to Thanksgiving dinner with out asking her

Lily steals Barney's playbook

Barney shows the guys his playbook, which all the tricks to get a girl

The gang finally learns what the scuba diver is and they realize they've been had

Barney's playbook contains an elaborate scam where you appear to be a rich guy...

Ted starts to worry that Robin and Barney are unhappy together when they slowly start to...