When Sheldon can't keep his mouth shut at a luncheon to meet the new department head, he gets fired. His loss of work leads to his doing all kinds of goofy experiments in the apartment. Leonard call his mom (Laurie Metcalf, who is fantastic) ande she moves in for a while and waits him out. We get a dose of her fundamentalism and her judgmentalism but it is really funny as Sheldon reacts to her. Excellent episode.
Review of The Luminous Fish Effect
