Luis plays Jesse Salander, known as 'Momma', a senior nurse who manages the residents.
Noah plays Elliot Dixon, a fresh-faced new resident at Angels Memorial Hospital.
Ben plays Dr Mario Savetti, a resident who grew up poor and sees ER as his only way out.
Harry plays Dr Angus Leighton whose father is on the hospital board at Angels Memorial.
Marcia plays Dr Leanne Rorish, an ER physician, known to her team as 'Daddy'.
Rob plays Dr Ethan Willis, a U.S. Army colonel with the Combat Casualty Care program.
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Give your PC a Grimm touch with this great Season 2 wallpaper.