Question: who played mark on one day at a time
Answer: Dwayne Schneider Main Mary Louise Wilson Ginny Wroblicki Main Michael Lembeck Max Horvath Main Recurring Main Ron Rifkin Nick Handris Main Glenn Scarpelli Alex Handris Main Boyd Gaines Mark Royer Recurring Main Shelley Fabares Francine Webster Guest Guest Recurring Main Recurring Nanette Fabray Katherine Romano Guest Recurring Main Howard Hesseman Sam Royer Recurring Main