Guy Williams Prof. John Robinson Actor June Lockhart Maureen Robinson Actor Mark Goddard Don West Actor Marta Kristen Judy Robinson Actor Bill Mumy Will Robinson Actor Angela Cartwright Penny Robinson Actor Jonathan Harris Dr. Zachary Smith Actor Dick Tufeld Robot Actor Wally Cox Tiabo Guest Star Janos Prohaska Giant Bird Monster Guest Star Irwin Allen Producer Barney Slater Writer Don Richardson Director