tonight, we're told british counter terror a officials are coming through the execution video. analysts say this is clearly an attempt by isis to threaten the west with a new version of jihadi john. in a familiar blast k mask and men nicing tone, he sands behind five hostages on their knees and aims his wrath at david cameron saying cameron is arrogant and foolish like his predecessors. >> in fact, david, you are more of an imbecile. only a imbecile would dare to wage war against the supreme. >> reporter: the men are accused of spying on the british. if this man bear as chilling resemblance to jihadi john, there is a reason. >> this person, whoever he is is