Gunn's old debts are called in.

Gunn's falling heart and soul in love with Fred - but his soul's not his to give. Seven years ago, with no real future ahead of him, the younger Gunn sold his soul - now the buyer, demon casino owner Jenoff, wants to collect his dues.

Gunn lives a last day to the full, then heads for the casino. Fortunately, his friends aren't just going to let him go, even if Jenoff loses his head over it.

Quiz - ten quick questions.

Trivia: Gunn reveals that he sold his soul not for fame, riches or love, but for his truck. It's almost a character in itself, having been seen regularly since Gunn's first appearance in season one episode War Zone.

The song heard during the flashback to Gunn's younger days is Gangsta's Paradise, by Grammy Award winning rap artist Coolio. As well as his mulit-plantinum recording career, Coolio has also done a bit of acting, appearing in films such as Batman and Robin.