Hank and Nick investigate a Jack the Ripper style killer on Grimm. "You Don't Know Jack" is the 20th episode of the show's fourth season.
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I know many would go with Sean Renard, but there's something about Monroe's smile that always makes me giddy. He's just an all around great guy with a genuine smile.
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Hank and Nick investigate a murder that leads back to a Wesen rite of passage on Grimm. "Iron Hans" is the 19th episode of the show's fourth season.
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A Native American myth comes to life and turns into a homicide on Grimm. "Mishipeshu" is the 18th episode of the show's fourth season.
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A string of murders leaves victims frozen solid on Grimm. "Hibernaculum" is the 17th episode of the show's fourth season.
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Nick and Hank come across a Wesen with a fatal touch on Grimm. "Heartbreaker" is the 16th episode of the show's fourth season.
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Rosalee and Monroe try to help Capt. Renard on Grimm. "Double Date" is the 15th episode of the show's fourth season.
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Silas Weir Mitchell and Bree Turner are Monrosalee
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Grimm Quotes

So, thanks, Mom, for being dead when I needed you the most.

Adalind

It almost sounds like Jack the Ripper was a Grimm, only he left their heads on.

Hank