Grant gustin plays barry allen.

Introduce the protagonist, Flash. It all started with that accident. .....

Candice Barton plays iris west.

Briefly introduce Barry's childhood friends and people that Barry likes.

Tom kavanagh plays Harrison Wells. Harrison wells

Introduce the doctor, Bole of Lightning, who is actually Abad Thorne of Lightning.

Rick cosnett plays Eddie Thorne.

Iris's boyfriend introduced her

Jesse Martin plays Detective West.

Iris's father, the police officer who took barry allen in.

Logan Williams plays barry allen Jr.

Brief introduction of young barry allen.

John Wesley Shipp plays Henry Allen.

Barry Allen's father profile, Earth 3 is Flash Jay garrick.

Michelle Harrison plays Nora Allen.

Barry allen's mother introduced.

Chad Rook plays Clyde Madon.

The weather wizard's brother was also influenced by the particle accelerator.

Danielle panabaker plays Caitlin Si Nuo.

Introduction by Frost Heizi, who is now a doctor's assistant.