Guest Stars Julio Torres voices Crispin Cienfuegos Martha Kelly voices Bethany David Herman voices Santiago Carpaccio Charlie Kelly voices Drama John Ariel Tweto voices Kima Brewper Paul F. Tompkins voices Mr. Golovkin Tim Bagley voices Principal Gibbons Kelvin Yu voices Steven Huang Margaret Cho voices Jan Wyatt Cenac voices Dr. Gary Brooke Dillman voices Dr. Polly Robin Thede voices Dr. Helena John Early voices Tooth 1 Michelle Badillo voices Debra Lizzie Molyneux-Logelin voices Tooth 4