Special Guest Stars Kevin Kline voices Calvin Fischoeder Guest Stars Pamela Adlon voices Olsen Benner Zach Galifianakis voices Felix Fischoeder David Herman voices August Sharfenheimer Andy Daly voices Samuel Summerbottom Andrés Du Bouchet voices Randolph Brackenbrown H. Jon Benjamin voices Godfrey David Herman voices Oscar David Herman voices Neighbor #1 Larry Murphy voices Neighbor #2