[s7e20] Sleeper -

: The urgency was due to a major imminent terror attack, meaning the CIA could not wait for Castle’s wedding to finish. Key Thematic Elements

: Episode titled "Touched" features a famous speech by Spike to Buffy. [S7E20] Sleeper

While Castle is the most direct match for "S7E20 Sleeper," the following shows also have a 20th episode in their 7th seasons: : The urgency was due to a major

A recurring dream—triggered by a brief news report about a Russian man named Ilya—leads Castle to seek help from Beckett's therapist, Dr. Burke. The investigation intensifies when a mercenary from Castle’s dream is found dead with a bullet to the forehead. [S7E20] Sleeper

The "mystery" of Castle's missing months is finally untangled: