Melissa & Joeystill has a few months left before it closes up shop, but Melissa Joan Hart has already lined up a surprisingly dark new gig.

The veteran actress will guest-star on The Mysteries of Laura as an internet radio host named KC Moss, a character inspired by Sarah Koenig, the host of the wildly popular Serial podcast, has confirmed.

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A former nobody, KC now runs a website bent on solving a 15-year-old cold case. However, she clashes with Laura (Debra Messing) when Laura thinks KC's site is getting in the way of the actual investigation.

Hart broke the news on Thursday when she shared two surprising behind-the-scenes photos.

Working with this fantastic woman! @therealdebramessing (And no she didn't give me the shiner) #MysteriesOfLaura #bts

A photo posted by Melissa Joan Hart (@melissajoanhart) on

Another hint about the show I'm guest starring on. Any ideas? #MysteriesOfLaura

A photo posted by Melissa Joan Hart (@melissajoanhart) on

Melissa & Joey is set to wrap its run this summer. The Mysteries of Laura airs Wednesdays at 8/7c on NBC. What do you think of Hart's new gig?

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