|Series 04, Episode 04|
|Air Date||29 September 2005|
|Previous||Divided They Fall|
Road Trip is the fourth episode of spook's fourth series which aired for the first time on 29 September 2005.
Adam goes undercover as a Circassian from Aleppo, Syria in a people-smuggling operation from Istanbul, Turkey to London in an attempt to turn the leader of a terrorist sleeper cell, Mohammed Yazdi and stop a planned terrorist attack against the Houses of Parliament.
He is able to turn Yazdi, where he implicates a Middle-Eastern Prince, Hakim. However, it is revealed that the plan all along was to assassinate the prince, which unfortunately succeeds after he is brought to Yazdi.