Eliot's line after the gunfight, "I don't [like guns]. Never said I couldn't use 'em.", is awfully close to Tom Selleck's line, as Matthew Quigley, in 1990's Quigley Down Under (1990): "I said I never had much use for [a pistol]. Never said I didn't know how to use it."
The trivia item below may give away important plot points.
Eliot kills several of Moreau's team. While it has been previously established (and re-affirmed in this episode) that he has killed in the past, this is one of only two times where he does so on camera-- the other being Leverage: The Homecoming Job (2008)-- and the only time where he kills someone as part of a job for the Leverage team.