Stroll on the Wild Side part 2 - S5-E8
Revealing mistake: Towards the end of the episode, when Murdoch attacks Falcone, look closely: the first punch - which knocks the mob boss down - looks convincing but the second time Murdoch "hits" him, he and punches nothing but the ground. Falcone is facing right while the detective strikes his left side, at least an inch away from his head.
Answer: The corridor crew on youtube talked about this: https://www.youtube.com/watch?v=jkvXGI6bk2Q&t=1017s Timestamp is 15:35 to skip to the scene you want.
lionhead