Dr. Katz, Professional Therapist Season 5 Episode 10 London Broil

Ben points out, "When we spend time together over breakfast: boring," leading to a discussion of the old games he and Katz used to play when Ben was a kid. Katz asks him to take the London broil out of the freezer, and then goes to work. When he gets home, Ben greets him with a clue -- the first in a series of 54 -- for a game of Treasure Hunt