"The Conference Valuation" -- Pictured: Rajesh Koothrappali (Kunal Nayyar), Sheldon Cooper (Jim Parsons), Amy Farrah Fowler (Mayim Bialik) and Howard Wolowitz (Simon Helberg). When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is in charge of the kids. Also, Sheldon finds a book on experimenting on kids, and the guys plus Amy make a day of it, on THE BIG BANG THEORY, Thursday, March 7 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Photo: Michael Yarish/Warner Bros. Entertainment Inc. © 2019 WBEI. All rights reserved.

GREY'S ANATOMY - "Blood and Water" - Meredith finds herself having to side with either Alex or DeLuca during a difficult situation, but she doesn't want to betray either of them. Meanwhile, Maggie reveals details about her personal life that cause a public stir, and Levi struggles with whether or not to tell his family about Nico, on "Grey's Anatomy," THURSDAY, MARCH 7 (8:00-9:01 p.m. EST), on The ABC Television Network. (ABC/Eric McCandless) GIACOMO GIANNIOTTI, ELLEN POMPEO

Supernatural -- "Ouroboros" -- Image Number: SN1414A_0358b.jpg -- Pictured (L-R): Alexander Calvert as Jack, Misha Collins as Castiel and Jared Padalecki as Sam -- Photo: Shane Harvey/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

WHISKEY CAVALIER - "The Czech List" - The Whiskey team is sent to Prague for their first official mission where Will has to seduce the widow of a notorious shipping tycoon in order to gain access to a list of criminal clients, but Frankie doubts his ability to deceive a grieving woman. Back in New York, the bureau assigns the team a new liaison, who just so happens to be the last person Will wants to see, on "Whiskey Cavalier," airing WEDNESDAY, MARCH 6 (10:00-11:00 p.m. EST), on The ABC Television Network. (ABC/Larry D. Horricks) ANDREJ POLAK, SCOTT FOLEY, BELLAMY YOUNG, LAUREN COHAN

Riverdale -- "Chapter Forty-Nine: Fire Walk With Me" -- Image Number: RVD314a_0388.jpg -- Pictured (L-R): Bernadette Beck as Peaches 'N Cream, Camila Mendes as Veronica and Vanessa Morgan as Toni -- Photo: Diyah Pera/The CW -- © 2019 The CW Network, LLC. All rights reserved.

THE ROOKIE - "Manhunt" - When a prison bus crashes, all units must respond as some inmates face severe injuries while others seek an opportunity to flee. In the wake of the accident, Officer Nolan tries to impress an FBI hostage negotiator while tracking down an escaped convict on "The Rookie," airing TUESDAY, MARCH 5 (10:00-11:00 p.m. EST), on The ABC Television Network. (ABC/Eric McCandless) AFTON WILLIAMSON, SEAN MAHER

The Flash -- "King Shark vs. Gorilla Grodd" -- Image Number: FLA515a_0016b.jpg -- Pictured (L-R): Candice Patton as Iris West - Allen and Jesse L. Martin as Detective Joe West -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All rights reserved

Arrow -- "Brothers & Sisters" -- Image Number: AR714B_0117b -- Pictured (L-R): Kirk Acevedo as Ricardo Diaz, Kelly Hu as China White and Liam Hall as Kane Wolfman -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.