As Mr. Waverly's car is driving up the road and thought to be the Thrush agent, the comment was made "those guys sure get big cars". Solo made the comment "When you're number 2 you have to try harder". This was the tagline for Avis rent a car at the time.
The title is based upon a quote from William Shakespeare's play "Julius Caesar" (Act I, Scene II): "But, for my own part, it was Greek to me".
The THRUSH helicopter is a Bell 47G Ranger.