In the Babylon 5 episode Voices of Authority, this exchange happens between Ivanova and Sheridan:
Ivanova: Is there anything else you need?
Sheridan: A glass of whiskey, a gun, and two bullets.
What Sheridan says feels like a quote from something. Does anyone know definitively whether or not it is, or if it's original JMS? If it is indeed a quote, what is it a quote from?