G: Guy Pearce
Guy Pearce's performance in Memento is definitely worthy of a mention here; having a fantastic performance would have certainly boosted Nolan's career back then and Memento was received very well by critics and fans. Nolan likes to use the same actors more than once in his films but unfortunately this has not been the case for Pearce. However, there's still time and maybe we could see a reunion soon. I would thoroughly recommend Memento to those who have yet to see it; it's a bit confusing at first and you need to pay attention when watching it but it is written to expertly by Nolan and company.
H: Howard Hughes
In 2002 Nolan wrote a script for a biopic based on Howard Hughes and described it as "the best script I've ever written." Unfortunately, he had to shelf this script because he realised Martin Scorsese had already begun working on The Aviator (2004), which starred Leonardo DiCaprio. Nolan's script was about Howard Hughes' later years, about how he became a paranoid recluse, whereas Scorsese's was about his younger years. However, Nolan decided it would be too much to have two films about one man made in such a short amount of time so he shelved it indefinitely. He has since worked with DiCaprio in Inception so you never know; maybe they're both waiting till Leo's a little older so he can star in it! Wouldn't that be something? He did briefly refer to Howard Hughes in The Dark Knight Rises where someone described Bruce Wayne as growing his fingernails long and collecting his urine in jars so maybe this is a sign Nolan is reconsidering the script.
I: Insomnia
Another huge moment in Nolan's career. His follow-up from Memento saw him directing some of the biggest names in Hollywood, giving his career a great boost. Starring Al Pacino, Robin Williams and Hilary Swank it saw two homicide detectives try and solve a strange murder in LA. It was after directing this that Nolan was asked to try and re-boot the Batman franchise which shows that Insomnia really did make him a trusted director.