TV Guide Sky Max Thursday

Harry Langford enlists McGarrett and Danny's help to track down a teenage British royal who has run away while under his protection. Meanwhile, Grover, Tani and Junior work a cold case

Part three of five. Barry meets Black Lightning at the Hall of Justice after things take a dire turn, while Iris suspects something is off with Despero's vision of the future so she seeks help from a powerful ally

SG Command learns an asteroid is on a collision course with Earth and hastily intercepts it by using the hyperdrive of a wrecked cargo ship to blast the colossal rock off course. Sci-fi drama, starring Richard Dean Anderson and Amanda Tapping

Part one of two. Daniel Jackson is recruited by the Tok'ra to infiltrate a secret meeting of the Goa'uld leaders. Sci-fi drama, starring Richard Dean Anderson and Michael Shanks

Part four of five. Barry is shocked when Eobard Thawne returns in the most unexpected way, while Damien Darhk offers him advice, but there is a catch. An epic battle begins with Reverse Flash pitted against Team Flash, Batwoman, Sentinel and Ryan Choi

While Callen suspects Hetty of keeping secrets about his past and Joelle surfaces in her quest to capture Katya, the team must track down an informant whose life is in danger. Return of the crime drama, starring Chris O'Donnell

Bravo battles to survive a devastating ambush, and afterwards the members of the team and their families come together to measure the cost. The return of the action drama, starring David Boreanaz