While investigating a murder case with no body and no brain to eat, the only evidence Liv and Clive have to work with is a grainy video and a little bit of blood found at the crime scene. Meanwhile, Blaine is up to his old tricks.

Despite Dina's protests, Amy lets Glenn's pastor host an Earth Day booth at the store, but things quickly unravel when Glenn won't recognize Amy's authority. Jonah spearheads Cloud 9's green initiative, but is met with apathy from his co-workers.

Maggie treats one of Station 19's own, and Jo learns a hard lesson. Meanwhile, when working with a family seeking asylum, Meredith makes a call that could jeopardize her career.

Felix Staples rattles the firm when he returns with a case against ChumHum, bringing along a familiar face as his representation, Solomon Waltzer. Diane receives a mysterious note at home, leading Kurt to question what she's been up to. Meanwhile, actor Gary Carr shadows Lucca for his upcoming role as a lawyer.

In her quest to bring down the sex trafficking ring, Tandy finds herself in a difficult and strange situation. Not sure what is going to happen, she always has Tyrone to lean on, no matter what the circumstance.

Johnny cautiously takes a stab at love, while Daniel and Amanda enjoy a romantic date night. An attempt to bring the students of the two dojos together backfires as hostilities between the teens escalate.

A space crew preparing for the first human flight to Mars is faced with a life-altering decision and its consequences.

Kripke has proof that Dr. Pemberton plagiarized his thesis in college, and Sheldon and Amy aren't sure if they should turn him in or not. Also, Wolowitz is happily surprised to learn that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him back in the day.

Stylist Marni Senofonte is back, this time to challenge the designers to work in her wheelhouse: celebrity styling. The designers divide into teams to create a mini-collection for their client, Deadpool's Morena Baccarin, who is heading to Rio on vacation. Some designers collaborate while others compromise, as they race to create cohesive looks that tell a vacation fashion story. Only one designer will win, and another will go on a permanent vacation from the competition.

The queens must razzle and dazzle in their very own magic show. Gina Rodriguez (Jane the Virgin) and Katherine Langford (13 Reasons Why) guest judge.

Georgie is thrilled when Veronica stays at the Coopers' house for a few days. Also, Meemaw and Dr. Sturgis celebrate their one-year anniversary.

After an embarrassing video of him falling off a stage goes viral, Jack plans a viral video of his own. Durbin, Helen and the teachers track down Whitlock's most notorious litterer: The Sugar Daddy.

Christy discovers her new job at a law firm isn't quite what she expected, and Bonnie's therapist, Trevor, pushes her to confront her problem with procrastination.

When Gina returns to the Nine-Nine, Jake and Terry get drawn into her life. Holt learns that Charles' son, Nikolaj, may be a genius. Rosa copes with an injury.

Following a deadly blaze inside a coffee beanery, the members of Station 19 find themselves on high alert as a beloved member of their team lands at Grey Sloan, leaving the future uncertain in the face of a life-threatening situation.

Jess reluctantly agrees to let Murphy go alone with Max on a day trip. While traveling, Murphy has flashback of memories of Tyson. Meanwhile, Jess and Joy realize they may have more in common than they thought.

In the race to tag out, the hunters are pulling out all the stops. Daniel and Big T use a special bait while Ashley surprises Ronnie with a secret weapon of her own. Frenchy needs "Cinderella" to reach a remote honey hole but can his trusty boat handle these oversized beasts? Willie goes all out to take down an old nemesis.

When Colleen and Matt learn they may not be allowed into the delivery room for the birth of the baby they are planning to adopt, they try to convince Morgan to have the baby at home. Heather is thrilled when Samantha has a falling-out with a friend who was a bad influence. Jen thinks Greg bought her a beautiful present only to discover it wasn't for her. John encourages Tim to see a cardiologist.

James gets offered a new position at work that he worries he's not qualified for, so Abby serves up some tequila shots in order to get him to accept the promotion. when James gets a little too much liquid courage, he offends Abby's neighbor.

Q, Joe, Sal and Murr test their parental instincts by reading their daughters' diaries, then they give presentations that are anything but normal. Tonight's big loser gets painfully honest with bodybuilders at the gym.

Host Neil deGrasse Tyson interviews parody songwriter "Weird Al" Yankovic; co-host Maysoon Zayid and astrophysicist Charles Liu join to discuss Yankovic's incorporation of science in his parodies, visual versus spoken comedy and being a nerd.

Sam winds down and reminisces.

The SWAT team finds itself under internal investigation after a civilian is killed as they attempted to bring in the city's most wanted criminal. As the mission details are revealed, the force's internal affairs team calls Hondo's leadership into question.

When a pop star is assaulted in her home, the SVU investigates the public feud between her rapper husband and a competing recording artist. Fin's family ties to a suspect take him off the case.

Allison defends a man arrested for selling illegal cigarettes and is determined to get him released without bail. Elsewhere, Judge Byrne is called to jury duty where his excitement for a chance at experiencing the criminal justice system from another perspective is quickly tempered by the harsh realities of the process. Meanwhile, Sandra is still emotionally recovering after sending her client to prison for murder.

FD braces for a night of insane full moon rescue calls. Plus, Eddie and Granny go on active appendage duty and Ike gets bitten into an altered state.

Host Neil deGrasse Tyson interviews author Patricia Cornwell; co-host Matt Kirshen and forensic pathologist Rebecca Folkerth join to discuss forensics; neuroscientist Andrew Newberg adds his expertise on the intersection of mind, body and soul.

A whale is suspected of spying for Russia, Jordan Klepper talks about his show Klepper, and actor Charlize Theron chats about "Long Shot" and the Africa Outreach Project.

Actor Kevin Nealon.

Actor Ryan Reynolds; actress Rosie Huntington-Whiteley; Kevin Abstract performs.

Stephen welcomes journalist Chris Cuomo, actor Nicholas Hoult, and actress Lily Collins.

While Catra searches for Shadow Weaver, Adora and Glimmer follow Bow home and learn that he's been lying to his family.

Rüya uses Levent as a pawn in her masterplan. Zeynep and Azra learn that the talismanic objects are losing their powers.

Elliot helps Sasha uncover what triggered Becky's behavioral changes. Yvonne digs deeper into the Annex. Nancy makes a troubling discovery.

James welcomes actress Anna Faris with musical guest Shaggy.

Henry and Winganuske clash when their daughter falls ill, while a rebellious boy arrives in town and Meredith takes an instant shine to him. To spite Yeardley, Jocelyn forges a relationship with the Pamunkey.

Team captains Paul Merton and Ian Hislop are joined by guest host Katherine Ryan and panellists Andy Hamilton and Cariad Lloyd.

Mickey Levante now has to choose who to take sides with. Genny, who had left Secondigliano in Patrizia command to pacify Naples, begins to be no longer certain of his choice.

It's time for choices. Who will reign over the smoldering ruins of Naples bloodied by the clan war?

Together on Graham's sofa tonight: Hollywood star Keanu Reeves, star of new action thriller John Wick: Chapter 3 - Parabellum; Aussie pop queen Kylie Minogue; Taron Egerton and Jamie Bell, playing Elton John and Bernie Taupin in biopic Rocketman; and Dr Foster star Suranne Jones, promoting new BBC drama Gentleman Jack. With music from Michael Rice, who performs the UK Eurovision entry Bigger Than Us.