With Jack's 50th birthday looming, he questions his happiness as Liz's ex-boyfriend Dennis "The Beeper King" decides to come clean to Liz about an addiction.
Jack: He is not your friend, he's your opponent. He's going to try to grab all the marbles and it's our job to hide them. Liz: That's not how you play marbles, Jack. Jack: But that's how you keep them.
