Synopsis by Hal Erickson
Singer Roberta Sherwood and her real son Robert Lanning guest in this episode as Roberta Schaefer and her "reel" son Bob. After a quarrel with Lucy (Lucille Ball), Viv (Vivian Vance) moves out of the house, whereupon banker Mooney (Gale Gordon) insists that a new tenant be found immediately. Enter Mrs. Schaefer and her son, who in no time flat convert the Carmichael living room into a rehearsal hall so that Roberta can practice her singing--day and night! In an effort to get Roberta out of the house and Viv back in, Lucy and Mooney try to land a singing job for the melodious tenant. Roberta Sherwood shows off her talents with spirited renditions of "Lazy River" and "Bill Bailey".