Fred Savage Kevin Arnold Actor Jason Hervey Wayne Arnold Actor Olivia d'Abo Karen Arnold Actor Dan Lauria Jack Arnold Actor Alley Mills Norma Arnold Actor Danica McKellar Gwendolyn "Winnie" Cooper Actor Josh Saviano Paul Pfeiffer Actor Arlen Dean Snyder Lloyd Arnold Guest Star Wesley Mann Mr. Lively Guest Star Helen Page Camp Opal Arnold Guest Star John Brandon Phillip Arnold Guest Star Earl Boen Pastor Guest Star Danny Breen Ray McKinsey Guest Star Ben Kronen Gentleman Guest Star Eda Reiss Merin Woman Guest Star David Huddleston Grandpa Arnold Guest Star Mark B. Perry Writer Robert C. Thompson Director