"High Potential" isn’t your typical crime drama.

Kaitlin Olson ("It's Always Sunny in Philadelphia") plays a brilliant single mom of three whose photographic memory catapults her from a job as a cleaner to one as the LAPD's secret weapon.

In the first season, Morgan Gillroy juggled motherhood and solving cases that stumped seasoned detectives. She also uncovered secrets about one of her ex-husbands, who disappeared 15 years ago.

As fans prepare for Season 2's premiere on Sept. 16, here’s what you need to remember from last season.

Matthew Lamb, Amirah J., Judy Reyes, Daniel Sunjata, Kaitlin Olson, Javicia Leslie, Deniz Akdeniz, Steve Howey in "High Potential." Andrew Eccles / Disney

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At the heart of the series is Morgan’s first ex-husband

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