My Wife and Kids (2001)

S4E18 Illegal Smile

The morning following a botched anti-wrinkle injection, Michael finds himself with a bizarrely rigid smile as he faces a traffic ticket in court. The judge is annoyed by his frozen expression and decides to sentence him to a night in jail. There, his cellmate, Big Guy, misinterprets Michael's constant grinning as romantic interest, leading to an awkward situation as Michael tries to explain the misunderstanding.