Due to CTV Television discontinuing synopses for its non-original programming by January 2016, synopses for Arrow, The Flash, iZombie and DC’s Legends of Tomorrow come from The CW Press after December 2015. Marvel’s Agents of S.H.I.E.L.D. and Marvel’s Agent Carter synopses come from Disney ABC Press after December 2015. Gotham and Lucifer synopses come from FoxFlash after December 2015. This is a tl;dr way to type “synopses soon come from the originating broadcaster”. Such are the realities of terrestrial Canadian television in 2015.

Gotham 2.11: “Worse Than a Crime” (CTV/Fox, November 30, 8:00 PM ET/PT)
“When Bruce Wayne (David Mazouz) is kidnapped, Gordon (Ben McKenzie) must look to some unlikely and dangerous allies for help. It is a battle of the villains, and not everyone makes it out alive.”
Fall finale.

Supergirl 1.6: “Red Faced” (Global/CBS, November 30, 8:00 PM ET/PT)
“Personal and professional stress get the better of Kara when she goes too far during a training exercise against Red Tornado, a military cyborg commissioned by Lucy Lane’s father, General Sam Lane. Also, Cat’s tough exterior is shaken by a visit from her judgmental mother, Katherine, and Alex enlists Winn to look into her father’s mysterious death…guest stars include Iddo Goldberg as Red Tornado and its creator, Dr. Morrow; Joan Juliet Buck as Katherine Grant, Cat’s mother; and Glenn Morshower as General Sam Lane, Lucy’s father.”

The Flash 2.8: “Legends of Today” (CTV/The CW, December 1, 8:00 PM ET/PT)
“In its second major crossover event with Arrow, Vandal Savage (Casper Crump, DC’s Legends of Tomorrow) arrives in Central City and sets his sights on Kendra Saunders (Ciara Renée, DC’s Legends of Tomorrow). After Vandal attacks Kendra and Cisco (Carlos Valdes), they turn to Barry (Grant Gustin) for help. Realizing how dangerous Vandal is, Barry takes Kendra to Star City and asks Oliver (Stephen Amell) and team to hide her until he can figure out how to stop Vandal. However, things quickly go from bad to worse when a man with wings named Carter Hall, a.k.a. Hawkman (Falk Hentschel, Reckless), shows up and flies off with Kendra. Meanwhile, Harrison (Tom Cavanagh) develops a serum to make Barry run faster and asks Jay (Teddy Sears, Masters of Sex) to test it out.”
Part one of the second Flash/Arrow crossover.

Marvel’s Agents of S.H.I.E.L.D. 3.9: “Closure” (CTV/ABC, December 1, 9:00 PM ET/PT)
“Ward’s (Brett Dalton) campaign for revenge brings the S.H.I.E.L.D. team to their knees, and Coulson (Clark Gregg) proves he will do anything to settle the score.”

Arrow 4.8: “Legends of Yesterday” (CTV/The CW, December 2, 8:00 PM ET/PT)
“In the second part of the major crossover event with The Flash, Oliver (Stephen Amell) and Barry Allen (Grant Gustin, The Flash) take Kendra Saunders (Ciara Renée, DC’s Legends of Tomorrow) and Carter Hall a.k.a. Hawkman (Falk Hentschel, DC’s Legends of Tomorrow) to a remote location to keep them hidden from Vandal Savage (Casper Crump, DC’s Legends of Tomorrow) while they figure out how to defeat him. Malcolm (John Barrowman) arranges a meeting between Vandal, Green Arrow (Amell), and The Flash (Gustin) that doesn’t go as planned. Meanwhile, Felicity (Emily Bett Rickards), Thea (Willa Holland), Diggle (David Ramsey), and Laurel (Katie Cassidy) work with Team Flash to come up with a weapon powerful enough to destroy Vandal Savage.”
Part two of the second Flash/Arrow crossover.

iZombie 2.8: “The Hurt Stalker” (shomi, December 2; also The CW, December 1, 9:00 PM ET/PT)
“Detective Babineaux (Malcolm Goodwin) arrives at the crime scene of a wedding planner who was shot to death, and is shocked to realize that he used to date the victim. To make matters worse, we learn that the murder victim was stalking Detective Babineaux, and that he is now the number one suspect in her murder. Liv (Rose McIver) and Ravi (Rahul Kohli) pose as an engaged couple in order to infiltrate the victim’s wedding planning business. Meanwhile, Major (Robert Buckley) is having a tough time dealing with Liv on stalker brains. Michael Wale directed the episode written by Sara Saedi.”

Screen capture ©2015 Berlanti Productions/DC Entertainment/Warner Bros. Television