The CW

Now that The CW’s four-way “Invasion!” crossover is behind us, Flash and Supergirl fans have the two-part musical crossover to look forward to in 2017. Some wild rumors early on suggested Joss Whedon might direct the crossover with Neil Patrick Harris reprising a famous role, but the Unfortunate Events star doesn’t seem to know much of anything about it.

On this week’s episode, it’s Christmas time in Star City, and Prometheus is cooking up some evil deeds! “What We Leave Behind” was directed by Antonio Negret from a script by Wendy Mericle and Beth Schwartz.

Apart from its 100th episode, Arrow Season 5 promises to bring fans to another major milestone for the series; completing the five-year flashback cycle that defined the early days. As such, we can cross one scene off the Season 5 finale next year, as a scene from the pilot will have Oliver in tatters once again.

Supernatural has run long enough to share The CW with both Smallville and the current generation of Arrow, Flash, Supergirl and Legends, as well as their many crossovers. We’d never expect Sam and Dean to drive the Impala through Central City, but it seems the Winchesters very nearly took a trip to the Smallville set.

‘Supergirl’ Season 2 takes aim at “Medusa” with an unofficial setup to the CW’s four-way “Invasion” crossover, but do our ‘Flash’-y guest stars pull focus from Alex’s big moment, or Kara’s relationship with Mon-El? And is it really safe to leave National City behind? Find out in our full review!

Now that all the extended trailers and sneak peeks are out in the open, we still need Supergirl to kick off the big “Invasion!” crossover this coming Monday. So it is with our first “Medusa” clip, that Thanksgiving dinner gets a very Flash-y entrance at an unexpected moment.

Legends of Tomorrow Season 2 has unfurled with a vastly different structure than its first season, with enough new characters that you’d forgive the absence of Arthur Darvill’s Rip Hunter. The Legends will have next week’s crossover to keep occupied, but new details shed light on when, and how Hunter will re-enter the picture.

We’ve less than a week before DC’s alien Dominators begin the four-part “Invasion” of Supergirl, Flash, Arrow and Legends of Tomorrow, but given at least half of The CW’s DC dramas traffic in time-travel, the invasion may already have begun. Like, World War II-begun. See for yourself, in a cryptic “found footage” teaser.

If there’s one thing Supergirl got shortchanged on, it’s hanging out with all the various heroes of The CW’s DC dramas. No longer, as our first new crossover “Invasion!” footage features Kara Zor-El blissfully meeting the heroes and Legends of another universe.

Before we get too deep into that epic four-way crossover, the Legends of Tomorrow have at least one more DC favorite to reunite with. See for yourself, as Johnathon Schaech’s Jonah Hex returns in the first trailer and new photos from next week’s “Outlaw Country.”