1.   But if you were arrested for murder they would have to be very careful not to blow their cover.

2.   But they have blown their cover.

3.   It would only take one phone call to blow his cover.

4.   They want to use a customised version to help their overseas operatives communicate home and browse without blowing their cover.

5.   It would only take one phone call to blow her cover.

6.   An undercover detective coming to the chilling realization that his cover has been blown.

7.   Angie blows her cover.

8.   A math teacher finally blew her cover when she was in the ninth grade, putting a newspaper article about a contest she won on the class bulletin board.

9.   A solitary figure at first, he scurried for the safety of a green metal railway when his cover was blown.