The Big C: season 1

Cathy doesn't want to be the one who is always responsible and in control, especially now that she has been diagnosed with a terminal case of melanoma. That's why she feels that she can give Adam a taste of his own medicine by treating him as thoughtlessly as he seems to treat her, all in an effort to make a point.

Cathy learns from Dr. Mauer that she probably has at least a year to live if not longer, which gives her some perspective of how much time she has left to do the things she wants. Chief among these is spending time with Adam. Cathy's actions seem crazy to Adam and Paul, both who still don't know about her medical diagnosis.

Cathy still isn't feeling like she can let Paul back in the house or in her life. Adam is still angry with her and avoids her at all cost. Her attempts at bringing Sean - and his girlfriend Daphne - and Adam and Andrea as meaningful parts of her life don't end up quite the way she envisions.

Since she knows she won't reach retirement age, Cathy decides to withdraw all the funds from her retirement plan and do whatever she wants to with the money without a care. Among other things, she indulges on material goods such as an expensive bottle of champagne, which she shares with her new confidante, Marlene.

Adam is not talking to his mother again since she caught him watching porn, which was bad enough, but what made it worse was that she continued to watch it with him and analyzed why it wasn't realistic from a female's point of view. Cathy realizes what she did with Adam was wrong, but she still wants to make sure that at age fourteen he is not yet having sex, and that when he does that he can both talk to her about anything in that vein and that he treat the girl properly. As she deals with this issue, she is beginning to see physical beauty around her, which includes blue iris flowers, her own body and how best to show it off, and the sexy new muralist at the school named Lenny. Meanwhile, Paul has sustained a rugby injury which has him sidelined, but not in the eyes of "rugby tart", Tina. And the building in which Sean is living is scheduled for demolition. The only way he figures he can save his makeshift home is to play the game by acting like one of the masses who has conformed to society. He gets an unexpected hand in looking the part.

During the course of their continuing sexual relationship where they do it anywhere they can on unofficial breaks during the school day, Lenny notices a lump on Cathy's lower back side. Dr. Todd's diagnosis is that the cancer is showing itself, but that it does not necessarily mean that the cancer is getting worse.

After Marlene tells Cathy about the distant relationship she has with her own two daughters who Cathy didn't even know existed, Cathy decides she and Sean need to go visit their own father, who she feels they don't see often enough. Sean reluctantly goes as he openly dislikes their father, who didn't give him the time of day while he was growing up.

It's Cathy's 43rd birthday. Coming to the realization that this birthday may be her last, she, on an impulse, takes Lenny up on his offer to accompany him to the Bahamas for the weekend. That plan is placed in jeopardy when Paul throws Cathy a surprise birthday party at the house.

Paul discovers his wife's affair and demands a divorce.

Cathy's relationships with three people are on the outs. Following his decision to divorce Cathy, Paul turns to rugby tramp Tina for solace. Cathy has decided not to rekindle her friendship with Rebecca, due to Cathy believing that she has always put her sexual quest for men a priority over their friendship.

Now that Paul knows about Cathy's melanoma, he wants to help her in any way he can, including investigating alternate treatments. He is also still trying to get over the fact that he lost three months in trying to help her, three months in her probably shortened life.

In an effort to be supportive of Cathy's decision and to find out more about it, Dr. Todd accompanies Cathy to Canada for her bee sting therapy. As open as he tries to be, Dr. Todd just can't get around how quackish the whole therapy seems.

Following Marlene's death, Cathy learns Marlene left her house. At first she's willing to let her daughters have it till she learns what their plans are. Dr. Miller wants her to try a different treatment which is risky. And she learns that Sean and Rebecca are expecting a baby.