Sketch chats to his dad, Eddie, about being inside and reveals some inspirational inkings.
Sketch learns about ink in women's prison, with Nancy and Naomi revealing painful pasts.
Sketch learns the symbolism of Russian prison ink and a dark meaning behind one of his own.
Meet a man who's spent half his life inside, and another who got a big wake-up call at 18.
Sketch inks a former gay porn star who spent time in a US prison for smuggling crystal meth.
A former Governor explains the dangers, while Sketch finds the worst prison ink he's seen.