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This week, there’s a new White Martian in town, and he’s after Miss Martian! It’s up to Supergirl and friends to protect M’Gann and re-enact The Thing with a monster that can read your mind and look like anyone! Also, Alex and Maggie try to see Barenaked Ladies in concert!

Supergirl had already promised the return of one metallic baddie in February’s “Luthors,” but might an armored Lex be far behind? That’s at least partly the insinuation in next weeks’ trailer, as the famous Luthor power armor is teased among other weapons.

News of a Flash and Supergirl musical had fans immediately pointing toward the cartoon Music Meister as its villain; if perhaps uncertain of the character’s outlandish style. Now, new set photos from cast and crew give us a look at Darren Criss in character as the vocal villain, and an early encounter with the team.

Arrow Season 5 hasn’t been without some notable returns, and now another trio are putting in their dues for the landmark year. Upcoming episode “The Sin-Eater” will see Oliver square off against China White, Cupid and “Lady Cop” Liza Warner, as Kelly Hu, Amy Gumenick and Rutina Wesley sign on for return appearances.

We still don’t know the exact identity of Supergirl Season 2's big bad, but we’re starting to think the Girl of Steel is going to war with all of ‘90s genre TV. After Lois & Clark star Teri Hatcher, latest to join Season 2 in a villainous role is Hercules himself, Kevin Sorbo in a mysterious role.

It’s been some time since we first learned that The Flash would take a two-part trip to Gorilla City, though only now, with Iris’ future hanging in the balance, do we learn what makes Season 3 go ape. Our first synopsis for the “Attack on Gorilla City” has arrived, revealing both a kidnapping, and a surprising alliance.

Regardless of network, any DC drama populating the airwaves will inevitably draw questions of a move or crossover with The CW multiverse. Case in point, FOX’s Black Lightning previously sought to keep separate from the other series, but now may end up on The CW regardless, and with a pilot order at that.

On this week’s episode, Oliver and the Arrow Babies make a trip to Hub City to track down their potential new Black Canary, while back in the past of the never-ending flashback, Talia al Ghul has a proposition for Ollie that he can’t refuse.

The Supergirl-Flash musical crossover “Duet” may not bring us a full soundtrack of original tunes, but what few new songs we get are quickly populating their own “City of Stars.” Not only is Crazy Ex-Girlfriend star Rachel Bloom contributing a number, but so too are composing team Pasek and Paul, lyricists behind La La Land.

So long as Supergirl and The Flash were going to be flexing their pipes for a musical duet, The CW would naturally want to keep things in the family, right? Yes, the musical stylings of Crazy Ex-Girlfriend will be present in the crossover event, as Rachel Bloom contributes a ‘Super’ song.