Note: To help refresh your memory, wiki links are provided for characters when available.
Castle - "Poof, You're Dead"
Chadwick Boseman guest starred as 'Chuck Russell,' the street magician who was fired by 'Zalman Drake,' the magician/murder victim. If you watched Persons Unknown, then you'll recognize him as 'Graham McNair.'
No Ordinary Family - "No Ordinary Brother"
Human Target - "Cool Hand Guerrero"
James Remar guest starred as 'Clancy Cole,' the warden of the Alabama prison where 'Guerrero' was being held. Dexter fans will recognize him as 'Harry,' Dexter's father. He has also played the role of 'Giuseppe Salvatore' on The Vampire Diaries.