Factual Error: Near the start, Charlie is attempting to guess the password to Hannah's flash memory stick. When Charlie types a password into the computer window, it displays it in large letters and does not cover it up with asterisks or similar. Considering this is an MI5 computer that will be taking security very seriously, this is implausible.
Charlie: We had a saying in the maths club, never judge a geek by his glasses.
Yates: Charlie, word of advice: don't make me look like a dickhead... ever.
This episode was watched by 703,000 viewers.
This episode was broadcast at 9:50pm, immediately after Episode 1.