The medication that Tommy takes to relieve anxiety is called "Hypnocil", the same name as the medication used to suppress dreams in the Nightmare on Elm Street series.
Stitches' vehicle has the left headlight X'd out, just like the scar he comes to receive.
Quentin Tarantino was offered the part of Stitches, and Mark Hamill came close to being cast in the role
Daniel Radcliffe was offered tom .
The line, said by Stitches, "Can you tell what it is yet?" is the catch-phrase of Rolf Harris.