Alexis enlists Castle's help on an Innocence Review case to prove that a death row inmate, Frank Henson, was wrongly convicted. With only 72 hours left before his execution, Castle and Alexis (with help from Beckett) urgently investigate the original murder, only to uncover explosive secrets that may seal Frank's fate.
Episode number: 6x7 Airdate: Monday November 04th, 2013
A man beats and murders a woman. As he runs out of the house, police arrest him. Another man shouts out to him as he is placed in the cop car. 15 years later, a judge tells the murderer, Frank Henson, that there is insufficient evidence to grant him a stay from his execution. Professor Edgar McDonald apologizes to Frank's brother John that there was nothing they could do. Alexis asks Edgar if there isn't anything they can do and he says there isn't...