Todd Giebenhain

Leonard is pleasantly surprised when his mother, Beverly, comes to visit and she’s genuinely kind toward him – until he finds out the real reason why she’s there; Meanwhile, Denise and Stuart overstay their welcome at the Wolowitz house.

The team dives back into investigating a serial killer from the past, attempting to find “The Puppeteer,” who lives with his victims’ bodies before disposing of them. Meanwhile, Brennan works through her guilt over her retirement last year, blaming herself for not stopping the serial killer earlier. However, little does she know she might be in some trouble of her own.

The team tracks a serial killer who keeps his victims' eyes as souvenirs.

At college, Sheldon decides to expand his responsibilities and become a dorm resident adviser; Meemaw and Dale make a sketchy business deal; Mary and George Sr. rekindle their romance.

When Francis is left in charge of his brothers, mayhem ensues, and Malcolm gets hurt, requiring hospitalization.

Lois forces Malcolm to befriend the meanest old lady on the block; Dewey begins carrying a purse to school.