Triumvirate of Terror! - S3-E8
Continuity mistake: To protect Bruce Wayne's identity from Lex, Alfred dons the Bat Suit and fights Lex to give Bruce enough time to get another bat suit on. Lex uses a laser to cut through a catwalk that Alfred is walking on and he falls. He is in front of Lex but at a distance. The real Batman walks up to Alfred and thanks him, then charges Lex. Suddenly he is behind Lex when doing this and Lex has to turn around to defend himself, despite just being focused where Alfred was. (00:15:20)