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While conducting his radio advice show, Frasier (Kelsey Grammer) receives a call from Gretchen, the wife of a philandering Austrian fencing instructor named Gunnar (Brian Cousins). As it happens, this is the same Gunnar who is currently giving lessons to Niles' wife, Maris. Jumping to the obvious conclusion, Niles (David Hyde Pierce) is convinced that Gunnar and Maris are engaging in more than innocent swordplay -- and the only logical solution is to challenge Gunnar to a duel. Irene Olga Lopez makes her first series appearance as the unseen Maris' maid Marta. This episode earned an Emmy Award for Outstanding Writing in a Comedy Series.