Tatiana Maslany

Sarah / Cosima / Alison / Helena / Rachel

Jordan Gavaris

Felix 'Fee' Dawkins

Josh Vokey

Scott Smith

Maria Doyle Kennedy

Siobhan 'Mrs. S' Sadler

Ari Millen

Mark / Rudy / Miller / Ira

Kevin Hanchard

Detective Arthur 'Art' Bell

Kristian Bruun

Donald 'Donnie' Hendrix