Angelus1
Angel Investigations
This happens mainly in series 2 than series 1 and 3,but angel doesn't breathe being that he's a vampire and all,yet when you see him walking in the dark,he (i don't know the medical or technical name for this so bare with me) he breathes,and you can see it becouse of what looks like cigarette smoke coming out of his mouth into the cold atmosphere,like it happens to all of us in the day and night when it's cold,but it shouldn't happen to him becouse of him not breathing and all,still like i said and unavoidable mistake,but i thought it was worth mentioning.