Ep 4. From Instinct to Rational Control

From Instinct to Rational Control is the fourth episode of the fourth season of Orphan Black. In this episode, Sarah is still reeling from the revelation that she had a biological sister who was raised by their mother. Determined to find out more, she tracks down Kendall Malone, their birth mother, who is being held in a safe house by Mrs. S.

Meanwhile, Alison is dealing with the aftermath of the drug bust at Bubbles, which has put her campaign for school trustee in jeopardy. She turns to Felix for help, but he's preoccupied with his own problems. His new art show is struggling to attract buyers, and he's worried about the future of his career.

Cosima, who is working with Scott to find a cure for the Leda clones' illness, discovers that her own transgressive sister, Charlotte, is also sick. She tries to keep the news from Sarah and the rest of the clones, but it's only a matter of time before they find out. The revelation brings Sarah and Cosima closer together, as they bond over their mutual concern for Charlotte.

As Sarah tries to get information from Kendall, a surprise visitor arrives at the safe house - Rachel. She's surprised to see Sarah and Kendall, but claims that she's there to help. Sarah is skeptical, but Mrs. S believes that they should hear Rachel out. Rachel reveals that she has information on Susan Duncan, the scientist who created the clones, and who is still alive.

Felix, desperate for cash, turns to a former client for help. She offers him a large sum of money in exchange for a favor - to retrieve a valuable item from a high-security facility. He reluctantly agrees, but things take a turn when he discovers that his client isn't who she seems to be.

As the episode draws to a close, Sarah and Mrs. S make plans to travel to Iceland to track down Susan Duncan. Cosima and Scott continue to work on the cure, while Alison's campaign takes a surprising turn. And as always, the clones' lives are full of danger and uncertainty, as they struggle to stay alive and protect each other in this strange new world.

From Instinct to Rational Control is a thrilling episode of Orphan Black, filled with twists and turns that will keep fans on the edge of their seats. With stunning performances from the talented cast and intricate plotting that continues to surprise and delight, this episode is a must-watch for anyone who loves sci-fi, drama, and suspense.