Orphan Black - Season 1 - Eps 4: Effects of External Conditions
Sarah realizes that the Orphans’ survival is going to take more than police work. But tracking the killer threatens Sarah’s long awaited reunion with her daughter, Kira. As Sarah gets closer to the killer, the killer gets closer to the truth – the ensuing showdown threatens to expose her ruse as a cop.
About Orphan Black

Title: Orphan Black
First Air Date: 2013-03-30
Last Air Date: 2017-08-12
Status: Ended
Rating: 7.804/10 (from 1283 votes)
Language: EN
Seasons: 6
Total Episodes: 50
Network: Space BBC America
Genres: Drama, Sci-Fi & Fantasy
Production Companies: Bell Media, Temple Street Productions, BBC America
Synopsis
A streetwise hustler is pulled into a compelling conspiracy after witnessing the suicide of a girl who looks just like her.
Cast

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