Sam Worthington, Shia LaBeouf, Andrew Garfield, James McAvoy, Taylor Kitsch, Garrett Hedlund, Zac Efron, Channing Tatum, Jake Gyllenhaal, Tom Hardy, Chris Hemsworth and Chris Pine were among those considered for the role of Matt Weston.
In an early draft of the screenplay, Matt Weston's ability to catch up to Tobin Frost was explained thusly: during his time at the CIA's academy for new agents in training, "The Farm", Frost's file was assigned to Weston as his case study. Weston had memorized Frost's history and used this data to explain to the CIA leaders where Frost would go once he was on the run. The scenes where Weston tracks down Frost in the South African township were kept for the final draft, but altered so Weston used ad hoc research skills to locate his charge.
Before Weston arrives at Green Point Stadium the stadium shows no activity. A few seconds later when he arrives there is suddenly a soccer match on and thousands of people around.
At the end of the film an exterior shot of the British House of Commons is followed by an interior of a completely different assembly then another exterior shot of the House.
Tobin Frost: That house was a secure location. Whoever crashed it didn't stop by a gas station and ask for directions to the nearest safe house. They were invited. Someone told them, Matthew. Think about it. Someone you know, so you better ask yourself, can you trust your landlord?