 Both Tony Hale (Buster) and Will Arnett (GOB) have appeared in  episodes of two HBO series: Sex and the City and the Sopranos. Hale  appeared in "The Real Me" from Sex and the City and "Second Opinion"  from the Sopranos. Arnett appeared in "La Douleur Exquise!" from Sex  and the City and "For All Debts Public and Private" and "No Show"  from the Sopranos.