Character mistake: The German dialogue between the ringmaster and the knife-thrower makes sense, but the words are spoken in a very awful way - hardly learned by heart and so wrongly pronounced, No German talks like that. (00:20:47 - 00:21:09)
Magic Fire - S2-E13
Character mistake: Bosley and the Angels are in the office and they discuss the case they have just solved. Bosley calls Charlie "Charles", which despite being correct is definitely odd. Nobody has ever called Charlie by his given name. (00:45:50)
Angel Baby - S2-E11
Character mistake: Sabrina, Kris and Bosley are discussing a girl who has just died. Her name is Annette, as it has been repeated several times. However, in one line, Bosley says "Angela's mother", rather than "Annette's mother". (00:25:40)
Answer: No, Charlie's face was never fully seen. In addition, Charlie was voiced by John Forsythe and he never even came to the set. Whenever we do see Charlie, it's a body double and not Forsythe.
Bishop73