The swimming pool used in the skinny dipping scene with Steve (Justin Chatwin) and Fiona (Emmy Rossum) is actually the same pool used in Cruel Intentions (1999), with Ryan Phillippe and Reese Witherspoon.
There was never a gun involved in the UK series, Shameless (2004); the events between Kash (Pej Vahdat), Ian (Cameron Monaghan), and Linda (Marguerite Moreau) happen regardless.
The sweater that Joan Cusack's character makes for Liam is not knitted as she says; it is crocheted.
Donny Maguire, the UK version of Mickey Milkovich (Noel Fisher), is not gay in the series, Shameless (2004).