The Good, the Bad and the Cursed - S3-E14
Continuity mistake: When Cole and Prue are about to shimmer to the other plain to find BO, Cole's face has not been shaved. But when they reach the other plain, his face is cleanshaven.
The Good, the Bad and the Cursed - S3-E14
Continuity mistake: After Cole kills the outlaw with an energy ball, he turns around to face Prue. In the following shot, he's facing the other way and turns around again. (00:39:45)