MacGyver Mac (Lucas Till) gets involved in a competition to create robotic vehicles suited for combat, and one competitor – an ex-love interest (guest star Ashley Tisdale) – has her entry hacked, and sent to attack the Pentagon in this new episode. Blindspot Jane (Jaimie Alexander) and her colleagues must locate nuclear warheads that have vanished. Crazy Ex-Girlfriend Rebecca (Rachel Bloom) begins reaching out to the world and helping others. Hawaii Five-0 Grover (Chi McBride) tries to dissuade the main suspect (guest star Devon Sawa) in his own wife's death from suicidal thoughts in the new episode. Taken The series inspired by the Liam Neeson-starring action movies opens its second season, with Clive Standen – as a younger incarnation of the Neeson character, CIA man Bryan Mills – and Jennifer Beals remaining from the first year's cast.

Riverdale When an article written by Alice (Madchen Amick) sparks tensions, Jughead (Cole Sprouse) steps into the role of peacekeeper. Also, Betty (Lili Reinhart) turns to Archie (KJ Apa) for support when she gets a threatening ultimatum. Empire Cookie (Taraji P. Henson) and others try to cover for Lucious' (Terrence Howard) memory problem. Nature A cheetah mother raises five newborns, teaching them how to hunt on the African plains. Dynasty The growing rivalry between Fallon and Cristal (Elizabeth Gillies, Nathalie Kelley) intensifies when they compete to be on the cover of a magazine, while Steven's (James Mackay) former boyfriend suddenly shows up.

Superstore The staff finds a body in the store on Halloween, prompting a variety of reactions from workers and customers. Supernatural Loretta Devine returns in her guest role as a psychic from Kansas, who turns to Sam and Dean (Jared Padalecki, Jensen Ackles) for help after a wraith (guest star Jon Cor) murders one of her friends and may be targeting her granddaughter (guest star Clark Backo), who shares her gifts. Grey's Anatomy A flashback to war-torn 2007 Iraq fills in some important blanks about events leading up to the kidnapping of Megan (Abigail Spencer), Owen's (Kevin McKidd) younger sister, who had been missing for 10 years. Gotham Gordon and Bullock (Ben McKenzie, Donal Logue) pursue a serial killer who has been murdering cops. The Good Place Michael (Ted Danson) needs Janet's (D'Arcy Carden) help to determine the cause of a new glitch before it gets out of control.

Superstore The staff at Cloud 9 are frantically working to prepare the store for its grand reopening following a tornado's destruction, and Amy and Jonah's (America Ferrera, Ben Feldman) relationship is strained after the intimate moment they shared. Grey's Anatomy The story picks up where the explosive season finale left off as Abigail Spencer joins the cast. Gotham Gordon's (Ben McKenzie) mission is to apprehend Jonathan Crane (guest star Charlie Tahan), but to do so he must return to Arkham. The Vietnam War "The Weight of Memory (March 1973-Onward)," the 10th and final episode of the miniseries by Ken Burns and Lynn Novick, concludes the expansive history of the divisive conflict. The Murder of Laci Peterson: A Closer Look New theories emerge in the wake of the verdict condemning Scott Peterson to death by lethal injection in the series finale of the miniseries.

Halt and Catch Fire Donna (Kerry Bishe) makes a play to land a heavy hitter, while her ex (Scoot McNairy), has a talk with one of their daughters about a troubling issue at school. Oprah's Master Class In the first of two new episodes, Usher describes how he dealt with fame at a young age and the role that family has played in shaping his career and life. Then soul singer Gladys Knight reflects on her coming of age in the music business, and the reality of touring in the segregated South of the 1950s. By a coincidence in programming all five movies in the action franchise are airing on three channels, but not in order. Up first is the fourth film, "The Bourne Legacy" (2012), starring Jeremy Renner and Rachel Weisz. 3 p.m. FX.

Masters of Illusion Xavier Mortimer, Scott Pepper, Chris Randall, Joshua Jay, Murray SawChuck, Billy Kidd and Greg Gleason are the featured magicians in this new episode hosted by Dean Cain. Killjoys As the Killjoys plan to execute a high-risk theft on a well-armored convoy, Aneela (Hannah John-Kamen) is distracted by her own to find Delle Seyah (Mayko Nguyen). Guy's Family Road Trip The Fieris depart Flagstaff, Ariz., and enjoy a flight through the Grand Canyon before heading east on Route 66 and making a few stops before getting to Albuquerque. Dark Matter Former Raza crew member and now emperor Ryo (Alex Mallari Jr.) captures Two (Melissa O'Neil) and holds her hostage in a bid to force the crew of the ship to give up the Blink Drive. Three, Five and Six (Anthony Lemke, Jodelle Ferland, Roger Cross) are ready to deal, but Ryo's negotiating position is undermined by treachery among his own ranks in this new episode of the science-fiction series.

Masters of Illusion Magic prevails for another summer as this showcase for prestidigitators starts its fourth season, with Dean Cain ("Lois & Clark: The New Adventures of Superman") returning as the series' host. Killjoys Still reeling from the devastating losses they suffered last season, Dutch, Johnny and D'avin (Hannah John-Kamen, Aaron Ashmore, Luke Macfarlane) go on the offensive in the season premiere of this space-set action drama. The Great British Baking Show The cooks are tasked with whipping up a better batter for baked goods in this new episode; with judges Mary Berry and Paul Hollywood. Dark Matter A rival of Tabor captures one of Adrian's (Mishka Thebaud) friends and demands a specific data file in exchange for her safe return in a new episode of this science fiction drama. Correspondents Eva Pilgrim and Nick Watt report on tense situations that can quickly become dangerous and deadly.

Supergirl Absent for most of this season, Calista Flockhart returns, and her character's reappearance complicates the problem Supergirl (Melissa Benoist) is facing involving actions that the president (guest star Lynda Carter) wants taken against Rhea (guest star Teri Hatcher). Dancing With the Stars In this new episode of the unscripted competition, each judge gives a couple a specific challenge. Also, Cheryl Burke returns to the dance floor for a special performance, and Calum Scott performs. Gotham The secret weapon earmarked by the Court of Owls to demolish the city is found by Gordon (Ben McKenzie), while Bruce (David Mazouz) discovers something dangerous in the plan devised by Kathryn and Temple Shaman (guest stars Leslie Hendrix and Raymond J. Barry). Man With a Plan Don and Marcy's (Kevin Nealon, guest star Kali Rocha) joy over getting a visit from their new grandson leads Adam and Andi (Matt LeBlanc, Liza Snyder) to consider having another baby.

Grimm After lying dormant for seven years, a new form of Wesen with a ferocious appetite emerges. Last Man Standing Eve (Kaitlyn Dever) surprises Mike and Vanessa (Tim Allen, Nancy Travis) with her decision about which college she wants to attend in this new episode of the family comedy. Rosewood The investigation of a suspicious death in an empty high-rise draws Rosie and Villa (Morris Chestnut, Jaina Lee Ortiz) into the inner circle of a former child star who wants to make a comeback. Ginormous Food Host Josh Denny visits Nashville, where he finds a 17-pound chicken gyro sandwich. Dr. Ken Ken (Ken Jeong) allows his wife (Suzy Nakamura) to think he wrote a love poem for her, but it was actually written by Dave (Albert Tsai) for his girlfriend (guest star Zooey Jeong, Ken's real-life daughter).

Hunted The Hunters set up a fake online dating profile in an attempt to lure two out of hiding. Showtime at the Apollo Steve Harvey hosts a new reboot of the classic talent showcase featuring Chaka Khan, T.I. with Meek Mill, Quavo and RaRa, Mike Epps and comic Gabriel Iglesias. Spy in the Wild: A Nature Miniseries This new documentary features footage from cameras disguised as wildlife that are able to capture candid and closeup footage of wild animals including wild dogs, elephants and monkeys. Star Star, Simone and Alex (Jude Demorest, Brittany O'Grady, Ryan Destiny) are invited to perform at a charity event in this new episode. NOVA In a new episode "Search for the Super Battery," host David Pogue investigates how batteries work and what the future may hold for technical innovation.