<P> He reappeared in "The Fetal Kick Catalyst" as a guest at Sheldon and Amy's brunch in their apartment . He mentions that a girlfriend he was living with once moved out and took all his best rocks . </P> <P> In "The Geology Elevation", Bert wins the McArthur Fellowship Grant from Caltech, which makes Sheldon jealous . When he is finally confronted by Sheldon over the latter's jealousy, Bert points out that the theoretical physicist has his friends and Amy to be happy about . He later goes with Sheldon to The Ellen DeGeneres Show to make peace with him . His full name is shown in his award . By the end of season 10, Raj moves into the apartment over Bert's garage . </P> <P> Bert reappeared in "The Separation Agitation", and it is revealed that he has a recent girlfriend named Rebecca, who only appears to be with him for his grant money . After breaking up with her, Bert instantly regrets it and buys expensive stuff to successfully win her back . And at the episode, he is revealed to have won her back . </P> <P> Beverly Hofstadter (Christine Baranski) is Leonard's narcissistic, unloving, and overly analytical mother . Beverly is a neuroscientist, as well as a psychiatrist . She is Sheldon's female equivalent regarding neurotically strict speech patterns, lack of respect for social conventions, and compulsive attention to detail . The only reason she had children was to use them as personal experiments for her research, so was very distant and unmotherly towards Leonard . Beverly mentions that Leonard's brother and sister are more successful in their respective fields than he is, though she respects this enough to keep contact with them (unlike Leonard); she is not proud, since they are not her accomplishments . One of her famous books is Needy Baby, Greedy Baby, in which she describes an infant's (Leonard's) unrealistic nurturing expectations . Sheldon often refers to her books when frustrated with Leonard's attempt to obtain some of his personal needs in their relationship . Leonard sees his mother as cold and not nurturing, even telling Penny that one time he made a hugging machine just to get hugs (and that his father asked to borrow it). The lack of Beverly's maternal feelings and actions toward Leonard has led to him being called the "King of Foreplay" because of his obsessive need to please . </P>

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