Main Characters Will Robinson 84 main appearances Robot 84 main appearances Narrator 84 main appearances Dr. Zachary Smith 80 main appearances Professor John Robinson 21 main appearances Dr. Maureen Robinson 21 main appearances Judy Robinson 20 main appearances Penny Robinson 18 main appearances Major Donald West 11 main appearances Robot 10 main appearances
Recurring Guest Characters Dr. Zachary Smith 1 guest appearances Judy Robinson 1 guest appearances Major Donald West 1 guest appearances Robot 1 guest appearances Captain Alonzo P. Tucker 2 guest appearances The Keeper 2 guest appearances Enforcer Claudio 1 guest appearances Dee 1 guest appearances Pleiades Pete 1 guest appearances Bartender 1 guest appearances Morbus 1 guest appearances Saticon # 2 1 guest appearances Saticon # 3 1 guest appearances Saticon # 1 1 guest appearances Sesmar 1 guest appearances Android Raddion 1 guest appearances Second Midget (uncredited) 1 guest appearances First Midget (uncredited) 1 guest appearances Keema 1 guest appearances Frog Alien (voice) 1 guest appearances ⇤ « 1 2 3 » ⇥