Ian Wallis' site said that they only aired about 27 episodes. That adds up to about six weeks of shows.
1975 Pilot (Shown on Faux Pause): Anne Meara, Nipsey Russell, Jimmie Walker, Sally Struthers, and Bobby Morse
Week 01 (Premiere): Jaye P. Morgan, Buddy Hackett, Marcia Wallace, Jan Murray, Pat Carroll, and Anson Williams
Week 02: Elaine Joyce, Buddy Hackett, Jaye P. Morgan, Jan Murray, Pat Carroll, and Nipsey Russell
Week 03: Jan Murray, Zsa Zsa Gabor, Nipsey Russell, Marcia Wallace, Buddy Hackett, and Michele Lee
Week 04: Robert Reed, Pat Carroll, Nipsey Russell, JoAnn Pflug, Jack Carter, and Jaye P. Morgan
Week 05: Meredith MacRae, Milton Berle, Zsa Zsa Gabor, Abe Vigoda, Pat Carroll, and Nipsey Russell
Week 06: Jaye P. Morgan, Jan Murray, Barbara Rhoades, Dick Smothers, Pat Carroll, and Tommy Lasorda
Week 15: Jan Murray, Zsa Zsa Gabor, Anson Williams, Pearl Bailey, Buddy Hackett, and Madlyn Rue
Week 16: Rita Moreno, Buddy Hackett, Barbara Rhoades, Jan Murray, Pat Carroll, and Orson Bean