Special Guest Stars Edie Falco as Celeste Cunningham Edward Herrmann as Walter Gladys Knight as Herself Guest Stars Maulik Pancholy as Jonathan Co Starring Kevin Brown as Walter "Dot Com" Slattery Grizz Chapman as Warren "Grizz" Griswold Toby Huss voices Deutsche Stimme James Arden as Detlef Julia Barnett as Charlotte James Cavanagh Burke as Coal Miner Uncredited Marisa Pierini as Popstar
