Plot Synopsis

ILL BEHAVIOUR is a comedy series that centers on three friends -- Joel, Charlie and Tess -- who embark on a journey that takes them to the extremes of their friendship, shattering every imaginable boundary to save a life. The series opens with Joel's divorce netting him a financial windfall and reuniting him with New Age Charlie and IT nerd Tess, his best friends from college. Eager to get Joel back on track, Charlie sets him up with Nadia, a sexy and unpredictable doctor. But just as Joel has reconnected with his friends, he discovers that Charlie has been diagnosed with cancer -- Hodgkin's lymphoma. And he is horrified to learn that he is refusing chemotherapy. Joel recruits Tess and Nadia to try and persuade Charlie to change his mind, but to no avail. Joel rents a remote house and buys black market chemotherapy drugs for Charlie. Enlisting Tess, they kidnap Charlie and administer the chemo, but it's not as easy as they hoped -- until Joel hires Nadia to be their live-in doctor. But after Charlie's attempted escape, Joel and Tess decide they need to keep a closer eye on him, especially after news of his disappearance and cancer diagnosis leaks online. So as not to arouse suspicion Joel decides he should visit Charlie's wife, Kira. However, while comforting her, he finds himself enjoying taking on Charlie's role in this ready-made family. Meanwhile, back at the house, Charlie's increasingly intimate spiritual guru act convinces Nadia to try and clean herself up. Joel and Tess secure Charlie behind bars in the cellar after thwarting his second escape attempt. With Nadia gone, Joel is increasingly spiraling out of control, drowning in an unhealthy concoction of drink, drugs and self-pity. Paranoia convinces Joel that Detective Talbot is following him after an unexpected visit to Kira's and that the net is closing in. Tess tells an out-of-control Joel to get a grip and focus on why they're there: to cure Charlie. In his hungover state, however, Joel smashes the final dose of chemo. Desperate to source more, they call Nadia, then her black market contact Shazia, but their attempts to secure more drugs eventually tip off the police. As armed officers approach the house, Tess, Nadia and Joel's only hope is to hold them off long enough for the final dose of chemo to be administered. ILL BEHAVIOUR had its U.S. premiere on Monday, November 13, 2017 at 10:30pm ET/PT on Showtime, which aired the series as six, half-hour episodes on consecutive Monday nights.
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On Monday, December 18, 2017 at 10:30pm ET/PT, Showtime premiered the season finale of ILL BEHAVIOUR. In the season ender, Tess tells Joel to get a grip and focus on curing Charlie; Joel smashes the final dose of chemo; the police get tipped off.