S3E9 · Stranger in a Strange Land

While in Thailand, Jack begins seeing a local tattoo artist, whom he bullies into giving him a tattoo. The next day, he is beaten and exiled by locals when they see his markings. In the present, Kate and Sawyer return to the island, where Karl explains that the Others live there but do their work on Hydra Island; he then leaves to save Alex. With Juliet under scrutiny after killing Danny, Jack is asked if she asked him to kill Ben, which he denies. He is put in the outside cages, where he is observed by a large group of tailies, now part of the Others. Jack treats Ben's infected back, getting Juliet's sentence reduced from execution to branding. As Jack is taken back to the island, an Other translates his tattoo: "He walks amongst us, but he is not one of us."