Season 2, Episode 15 - "Revelations"

Spencer Reid (Matthew Gray Gubler) is one of the show’s most beloved characters - a fan favorite if you will. Suffice to say, when he was kidnapped by Tobias Hankel in "Revelationsit was horrifying for both fans and the BAU on the show.

The episode follows Reid’s grueling torment as he’s held captive, including painful flashbacks to his childhood and his

(Jane Lynch), the team scrambling to save him in time, and the beginning of his eventual addiction to Dilaudid. The episode is difficult, particularly for Reid fans, and will leave you inconsolable.

Season 5, Episode 9 - "100"

Aaron Hotchner (Thomas Gibson) has always led the BAU in a way that most have no choice but to respect.

When The Reaper returns, ready to wreak havoc on Hotch and his family, the team must rush to find Haley (Meredith Monroe) and Jack (Cade Owens), Hotch’s ex-wife and son, before it’s too late.

Haley’s death at the hands of The Reaper is heartbreaking, to say the least, and Hotch’s fight with The Reaper after this is demonstrative of a man at his absolute breaking point. This episode will have you fighting tears for Haley’s cruel demise, whilst admiring the BAU’s ability to always put each other first, no matter the circumstance.

Season 7, Episode 24 - "Run"

The second part in the two-part Season 7 finale is a cross between sad and tense. With JJ (AJ Cook) terrified about the safety of her fiance and son, Will (Josh Stewart) and Henry (Mekhai Andersen) at the hands of the team of unsubs.

With the BAU struggling to establish what the next move will be, and JJ frantic about the fate of her family, this episode has you on the edge of your seat.

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