Promotional image and description for the Supergirl and Flash crossover episode "Worlds Finest"

CBS has released an official description for the Supergirl/Flash crossover episode “Worlds Finest” airing Monday, March 28 on CBS.

They have also released some cool promo art which you can see to your left. It’s evocative of the classic Superman #199 as well as other homages that came decades later. Here’s the description with some new spoilers, including the coming of a Dr. Amelia Hamilton (a nod to Dr. Emil Hamilton?):

SUPERGIRL GAINS A NEW ALLY WHEN THE LIGHTNING-FAST SUPERHERO ‘THE FLASH’ HELPS HER BATTLE LIVEWIRE AND SILVER BANSHEE, ON “SUPERGIRL,” MONDAY, MARCH 28

Grant Gustin Crosses Over as “The Flash”

“Worlds Finest” – Kara gains a new ally when the lightning-fast superhero The Flash (Grant Gustin) suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home, on SUPERGIRL, Monday, March 28 (8:00-9:00 PM) on the CBS Television Network. Grant Gustin crosses over as The Flash.

Supergirl stars Melissa Benoist (Kara Danvers/Supergirl), Calista Flockhart (Cat Grant), Chyler Leigh (Alex Danvers), Mehcad Brooks (James Olsen), David Harewood (Hank Henshaw/J’onn J’onzz), and Jeremy Jordan (Winslow “Winn” Schott).

Recurring guests in “Worlds Finest” include Jenna Dewan-Tatum (Lucy Lane), Chris Vance (Non), Italia Ricci (Siobhan Smythe), Brit Morgan (Leslie Willis/Livewire), Christopher Showerman (Tor), Jay Jackson (News Anchor), and Dan Warner (Fire Captain).

Guest stars in the episode also include Grant Gustin (The Flash/Barry Allen), Jamie Kaler (Pundit #1), Samantha Harris (Pundit #2), Zarek King (Young Boy), Sarah Robson (Dr. Amelia Hamilton), Harriet Sansom Harris (Sinead), Dawn Greenidge (Pedestrian Woman)

STORY BY: Greg Berlanti

TELEPLAY BY: Andrew Kreisberg & Michael Grassi

BASED ON: The Characters Appearing in the DC Comics

DIRECTED BY: Nick Gomez

Read more Supergirl spoilers on our Supergirl Spoilers Page! – Read more about The Flash at FlashTVNews