Ben Vereen

The residents and interns treat the victims of a massive explosion at an apartment building; Mama Burke returns to collect her son's things; Lexie tries to have a heart-to-heart with unwilling Meredith.

Chunk represents his first legal client, a young man facing federal counterfeiting charges; Bull represents the young man's grandfather who may lose his business to the FBI for owning the barbershop where the fake goods were sold.

When the gang helps Barney's mother move, they learn that she has lied to him about events throughout his life; Robin oversells Ted to a blind date.

Lily and Marshall receive shocking news that has a profound impact on the gang; Ted begins his duties as best man for an old friend's wedding.

When dozens of children from military families come down with a mysterious illness, the team tries to deliver a cure before the holidays.

Barney concocts a plan when his father (John Lithgow) arrives at the hotel; Ted thinks he is being framed when a wedding-related duty gets messed up.