Go back to Day 1…. 28 Days Later was one of Oppenheimer star Cillian Murphy’s breakout roles back in 2002. He played Jim, a bicycle courier who woke from a coma to find himself in a post-apocalyptic London after an aggression-inducing virus led to the breakdown of society. Murphy failed to return for 2007’s 28 Weeks Later, which followed a different cast of characters.