How Xena: Warrior Princess and Buffy the Vampire Slayer changed the TV musical episode forever.

Musical episodes of TV shows werent invented byBuffy the Vampire Slayer, nor byXena: Warrior Princesseither.

But there is also a fairly long-standing tradition of non-musical shows including musical episodes from time to time.

Sarah Michelle Gellar as Buffy the Vampire Slayer

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There are a couple of noticeable themes throughout these episodes.

Xena: Warrior Princessactually did two musical episodes.

But it was the the shows first musical episode that broke the mold.

But it could be incredibly dark, especially when dealing with Xenas past as a ruthless killer.

Only something really dramatic could heal the rift.

ButXena, although often dramatic, was at heart a family show built on entertainment and humor.

The Bitter Suite was a huge success, and remains one of the most popular episodes of the series.

We challenge you to watchXenasing her apology to the spirit of her dead son without crying.

Like The Bitter Suite, Once More, With Feeling didnt neglect color, liveliness, or humor either.

sequence are quite something.

Once More, With Feeling also features probably the funniest and most well-observed line in any TV musical episode.