Mike describes his mother as "tall, blonde, looks like Donna de Varona," a play on her being the real-life sister of Joanna Kerns.
The German episode title is "Die Ignorantin", meaning "The Ignorant"
Asked by Maggie if he's seen Jason, Mike responds, "tall man, looks like a talk show host?", playing on the fact that Alan Thicke hosted a short-lived talk show called Thicke of the Night.
The title and plot elements play on George Cukor's 1948 movie, Adam's Rib.