Arrow will not air a new episode tonight, Wednesday, November 25.

After last week’s episode featured the return of Andy Diggle, Arrow will be taking a week off for Thanksgiving. Next week, Arrow will be back with the second part of the two-part Arrow/Flash crossover that will set up DC’s Legends of Tomorrow. The following Wednesday, December 9, will be the mid-season finale.

The CW will instead air Planes, Trains, and Automobiles at 8:00 p.m. ET on November 25.

Watch the promo for the upcoming two-part Flash/Arrow crossover:

Last season, it wasn’t required that fans watch both The Flash and Arrow to understand the stories being told since they were self-contained. However, this season it will be necessary for viewers to watch The Flash season 2, episode 8, “Legends of Today,” on Tuesday, December 1 and Arrow season 4, episode 8, “Legends of Yesterday,” on Wednesday, December 2 to get the full story being told.

The synopsis for the Arrow midseason finale, titled “Dark Waters,” reads:

“OLIVER TAKES ON HIVE — After the city is attacked again, Oliver (Stephen Amell) makes a bold move against HIVE. Malcolm (John Barrowman) checks in on Thea (Willa Holland) and leaves her with a warning. Things take a horrible turn when Damien Darhk (guest star Neal McDonough) retaliates in a brutal manner at Oliver’s mayoral holiday party. John Behring directed the episode written by Wendy Mericle & Ben Sokolowski (#409).”

According to EP Greg Berlanti, in the mid-season finale, “You’ll definitely get a cliffhanger about who it could end up being in that grave from the [flash-forward scene in the] season premiere.” Moreoever, Berlanti has a feeling “people are gonna be mad” at where the episode leaves the characters.

That does not seem out of the realm of possibility, as fans may remember that season 3’s mid-season finale featured a shocker of its own: the apparent death of Oliver Queen at the hands of Ra’s al Ghul.

Arrow season 4, episode 8, “Legends of Yesterday,” airs Wednesday, December 2 at 8:00 p.m. ET on The CW.