LAW & ORDER: SPECIAL VICTIMS UNIT -- "The Longest Night of Rain" Episode 21012 -- Pictured: (l-r) Kelli Giddish as Detective Amanda Rollins, Peter Scanavino as Detective Sonny Carisi, Mariska Hargitay as Captain Olivia Benson, Robert John Burke as Captain Ed Tucker -- (Photo by: Heidi Gutman/NBC)

Riverdale -- "Chapter Sixty-Seven: Varsity Blues" -- Image Number: RVD410a_0072.jpg -- Pictured (L-R): Cole Sprouse as Jughead and Lili Reinhart as Betty -- Photo: Jack Rowand/The CW-- © 2020 The CW Network, LLC All Rights Reserved.

CHICAGO MED -- "Leave the Choice to Solomon" Episode 512 -- Pictured: (l-r) Yaya DaCosta a April Sexton, Brian Tee as Dr. Ethan Choi -- (Photo by: Elizabeth Sisson/NBC)

"Hairtrigger" - When a young man is traumatized by his experience surviving a mass shooting, and radicalized into an anti-government terrorist, the team must act quickly to track him down before he can exact revenge on those he believes failed him, on FBI: MOST WANTED, Tuesday, Jan. 21 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured Nathaniel Arcand as Clinton Skye Photo: Mark Schäfer/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

DC's Legends of Tomorrow -- "Meet the Legends" -- Image Number: LGN501b_0095b.jpg -- Pictured (L-R): Adam Beauchesne as Kevin Harris, Brandon Routh as Ray Palmer/Atom, Jes Macallan as Ava Sharpe, Caity Lotz as Sara Lance/White Canary, Nick Zano as Nate Heywood/Steel, Shayan Sobhian as Behrad, Ramona Young as Mona and Dominic Purcell as Mick Rory/Heatwave -- Photo: Jeff Weddell/The CW -- © 2020 The CW Network, LLC. All Rights Reserved.

"Payback" - When the son of a well-known retired FBI agent is taken just blocks from their home in what appears to be a revenge kidnapping, the team must uncover if it's tied to the agent's past or trouble the son has gotten into on his own. Also, Isobel must make a hard call when information from the past comes to light, on FBI, Tuesday, Jan. 21 (9:00-10:00 PM, ET/PT) on the CBS Television Network Pictured (L-R) Zeeko Zaki as Special Agent Omar Adom 'OA' Zidan and Missy Peregrym as Special Agent Maggie Bell Photo: Mark Schafer/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"Sound Off" -- After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident. Also, Palmer carefully interviews medical examiner assistant candidates, on NCIS, Tuesday, Jan. 21 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Wilmer Valderrama as NCIS Special Agent Nicholas "Nick" Torres, Sean Murray as NCIS Special Agent Timothy McGee, William R. Moses as Edison Geary. Photo: Eddy Chen/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

SUPERSTORE -- "Favoritism" Episode 513 -- Pictured: Nico Santos as Mateo -- (Photo by: Evans Vestal Ward/NBC)