When Joy Division are about to make their first television appearance they are warned by Tony Wilson that he will cut them off if they swear at any point. He also tells them to trust him as he knows when you can and can't swear on TV. This is probably a nod to years later, when in real life Tony Wilson was suspended from his job at Granada for swearing into a microphone that he didn't realize was on.
On the contract signed in Tony's blood, drummer Stephen Morris' name is spelled Steven. (The band mocks Tony's lightheadedness from the blood loss by falsely telling him that "Morris" needs to have a second "s" added, but no mention is made of the misspelling of his first name.)
The following FAQ entries may contain spoilers. Only the biggest ones (if any) will be covered with spoiler tags. Spoiler tags have been used sparingly in order to make the page more readable.
Q
What did Ian (in the movie) hang himself on?
A
It was a drying rack - the thing the socks and stuff were hanging on in an earlier scene when he went into the kitchen and got depressed by all the baby bottles and drying laundry.
Q
Any recommendations for other band biopics similar to Control?
A
Some people have noted similarities between Control and Oliver Stone's The Doors (1991), which details the life of The Doors' late singer, Jim Morrison [1943-1971]. Similarly, there's What We Do is Secret (2007), a film about the life of The Germs' singer Darby Crash [1958-1980].