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Relapse
John tries to rein in his compulsions, but is tested when he's tipped off about an impending massacre. Samantha, meanwhile, turns to Det. Holden for answers.
![](https://image.tmdb.org/t/p/w300/7QewmjzcCQDct2FAQC4sNolJWYL.jpg)
![](https://image.tmdb.org/t/p/w300/2YGnLbyMOSRcDaDJaAV6iL8GmVK.jpg)
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Other episodes for this season
![Pilot](https://image.tmdb.org/t/p/w300/khutun9lKsg4d1u5AatCL8gOGQh.jpg)
![Infection](https://image.tmdb.org/t/p/w300/2Obc36USUIiyk6X9RrXpmzmR3vk.jpg)
![Onset](https://image.tmdb.org/t/p/w300/prVymnQkknZyk1NawV7akH9NbGS.jpg)
![Immune Response](https://image.tmdb.org/t/p/w300/4kob4o7kvXO98tUAvS7eZmDWqvK.jpg)
![Outbreak](https://image.tmdb.org/t/p/w300/5FNbEloJWJiYcDaNxIPGjXvi8qp.jpg)
![Diagnosis](https://image.tmdb.org/t/p/w300/aI8rSA2dqgDRkxwfXXiKBczIx3z.jpg)
![Fever](https://image.tmdb.org/t/p/w300/eS0zrTB0zQBEfcuX815Rg4Yy7g3.jpg)
![Relapse](https://image.tmdb.org/t/p/w300/aUDlLYKyTA858XfmPwdbbivO8gm.jpg)
![Deterioration](https://image.tmdb.org/t/p/w300/w0wbybMlLBc5sgYy0B3OCTFQ2Cd.jpg)
![Critical Condition](https://image.tmdb.org/t/p/w300/t2zE9RvqrckECXVmFr42y6H0R10.jpg)
John tries to rein in his compulsions, but is tested when he's tipped off about an impending massacre. Samantha, meanwhile, turns to Det. Holden for answers.