In one scene, Dan Hedaya and friends are listening to Emily play the piano. She is playing the song "Where Everybody Knows Your Name," the Cheers (1982) theme song. Hedaya played Nick Tortelli on Cheers from 1984 to 1987.
When Dooey had Doug and Steve kicked out of Zadir's office, we see him following the guards down the hall. He jumps from halfway down the hall, back to Zadir's door to tell Zadir that it was just a couple trespassers.