Barney quotes William Shakespeare to the conniving Mr. Quentin: "Conscience doth make cowards of us all." (Hamlet, Act III, Scene i).
The title is from the movie Bus Stop (1956). The original Broadway production of "Bus Stop" by William Inge opened at the Music Box Theater in New York on March 2, 1955, ran for 478 performances and was nominated for the 1956 Tony Award for the Best Play.