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Type

Scripted

Premiered

May. 21, 2015

Status

Returning Series

Runtime

60 min.

Country

USA

Network

The CW TV Network

Genre

- action
- adventure
- drama
- superhero
- dc-comics

Also Watch

DC's Legends Of Tomorrow

The Flash (2014)

Top Contributors

Supergirl » Season 1

Supergirl - 01x18 Worlds Finest

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1x18 Worlds Finest

4.7/5 (23 votes)

First Aired: Mar. 28, 2016 on The CW

Summary: Kara gains a new ally when the lightning-fast superhero The Flash (guest star 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.

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Watch Episode On:

- Xfinity (free)
- CBS (free)
- CBS (free)

Series Main Characters

Guest Stars

[no credits found]

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