There’s a big “Supergirl” and “Batwoman” crossover coming up. A preview video that has been released online shows the two superheros teaming up once again to take on the bad guys.

The trailer shows Batwoman (Ruby Rose) and Supergirl (Melissa Benoist) fighting the villains individually. Towards the end of the video, the two of them meet and shake hands.

Kara Danvers remarks that the two superheroes make a good team. Kate Kane in response says they are the “world’s finest.”

The crossover will happen in the highly anticipated “Crisis on Infinite Earths” event. What is also special about the trailer is that it has announced that the two TV shows will air back to back on Oct. 6. The video referred to Sundays as “soaring,” “smashing,” and “super” because of the two shows.

This is not the first time that Batwoman will be meeting Supergirl. The two of them met during the “Elseworlds” crossover in the previous season, CBR reported.

Batwoman is getting her own solo TV series now that will premiere on Oct. 6. The TV series is scheduled to air at 8 p.m. ET/PT every Sunday.

A teaser trailer of “Batwoman” that has been released on the official Twitter page of the TV series shows the look of the character. The video shows the character with a short haircut, wearing a black leather jacket, walking towards a hole in the wall.

“People aren’t always what they seem,” the caption of the “Batwoman” post reads. The hole in the wall is shaped like a Batarang. It remains to be seen how Rose’s character on the show will be different from what the fans already know about the comic book character.

“Supergirl” Season 5 will also premiere on Oct. 6. It will air at 9 p.m. ET/PT on the CW. The finale episode of Season 4 was about the superhero using the power of the press to fight Lex Luthor (Jon Cryer).

Supergirl There wil be a big "Supergirl" and "Batwoman" crossover. Supergirl/Facebook