Battle of the Bulbs

S2 E3: Lem flips out when his mother (guest star Khandi Alexander, "CSI: Miami"), a brilliant scientist who has always intimidated him, comes to visit and begins an affair with Dr. Bhamba (Maz Jobrani). Meanwhile, Ted gets miffed when Linda suddenly gets all the credit after she makes a suggestion to improve on his prize project, a light bulb that burns forever.