Underbelly Files: Infiltration is an Australian made-for-television movie that aired on 14 February 2011 on the Nine Network. It is the second of four television movies in the Underbelly Files series, the other three being Tell Them Lucifer was Here, The Man Who Got Away, and Chopper.

It tells the true story of Victorian detective Colin McLaren who posed as a shady art dealer and infiltrated the Australian branch of the Calabrian Mafia. The character Antonio Russo is loosely based on Antonio Romeo of the Honoured Society (Australia).

The ISAN production code number is 0000-0002-9A74-0002-L-0000-0000-B or 170612-2 (in shorter decimal form).