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, ET/PT) on the CBS Television Network. Grant Gustin crosses over as The Flash.

REGULAR CAST:

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)
Jeremy Jordan (Winslow "Winn" Schott)

RECURRING CAST:

Jenna Dewan-Tatum (Lucy Lane)
Chris Vance (Non)
Italia Ricci (Siobhan Smythe)
Brit Morgan (Leslie Willis/Livewire)
Christopher Showerman (Tor)
Jay Jackson (News Anchor)
Dan Warner (Fire Captain)

GUEST CAST:

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 and Michael Grassi

BASED ON: The Characters Appearing in the DC Comics

DIRECTED BY: Nick Gomez