Episode 8, I believe. I couldn't find any independent corroboration of whether or not Sammy actually urinated in Fiala's mouth but after Fiala pulled all his bullshit and pulled an Uzi on Sammy, I could see Sammy showing the ultimate contempt for an adversary, not only that but it's sends a message to everyone of what happens when you fuck with the Bull.
No, it was this one: Podcast Season 1 Episode 9: Would You Kill Paul?