<P> Lucy appears in season 10, where Raj invites her to his apartment along with his other ex-girlfriends to find out why he is still single . Lucy mentions that she is now in a better relationship . </P> <P> Mary Cooper (Laurie Metcalf) is Sheldon's loving, caring and religious mother and a devout Christian from Texas . She has two other children besides Sheldon; Sheldon's twin sister, Missy, and his brother George, who is shown via a family tree to be three or four years older than Sheldon and Missy . Her husband, a rambunctious alcoholic, was also named George, but he died when Sheldon was still a boy . To Mary's relief, her other children do not share Sheldon's hyperintelligence, once commenting to Leonard, "I thank the good Lord my other kids are as dumb as soup". Mary herself is not intellectual, but is quite wise, though she is prone to making insensitive comments such as calling Japanese words "kung fu letters" at a sushi restaurant, or calling Native Americans "" our" Indians ". Despite her extreme religious views, she is tolerant of other faiths, as evidenced by her serving Raj a dish of chicken after making sure it was not something Indians considered "magical". She also struggles to follow her beliefs sometimes . She is a loving mother and has been able to control Sheldon, with Leonard describing her as Sheldon's "Kryptonite" to Penny . When Penny and Sheldon engaged in a fierce dispute, Penny called for Mary's help, who subsequently called and scolded Sheldon about his actions . Leonard wishes his mother were as loving as Sheldon's mother, although Sheldon himself appears at best ambivalent about her parenting . Sheldon once mentions that Mary once hit him with a Bible because he refused to eat his Brussels sprouts . She apparently thought something was wrong with her son while he was growing up, as Sheldon will often remark after someone calls him crazy, "I'm not crazy; my mother had me tested!" Though Mary confirms this, she wishes that she had taken him to Houston for further testing . </P> <P> In her first visit, Leonard calls Mary to intervene when Sheldon is fired for being disrespectful to his new boss, Dr. Gablehauser . She manages to convince Sheldon to apologize and he gets his job back, and she becomes romantically interested in Dr. Gablehauser . When Sheldon asks, "Is Dr. Gablehauser going to be my new daddy?", Mary replies, "We'll see". </P> <P> In season three, after returning from the North Pole, Sheldon returns to his home in Texas after the other guys tampered with his research . Mary calls the guys and they come to fetch Sheldon . Sheldon initially refuses to leave, although after an argument with his mother about evolution, Sheldon decides to leave . Mary is again called to intervene in "The Zazzy Substitution" when Sheldon buys a clowder of cats after his "break - up" with Amy . Mary uses reverse psychology to get Sheldon to reconcile with Amy . She again comes to visit in "The Rhinitis Revelation" before going on a Christian cruise, and Sheldon becomes jealous when she would rather go sightseeing with the rest of the gang instead of cooking for him and attending physics lectures . </P>

Who plays the therapist on big bang theory