Bitch in Sheep's Clothing: a mild variation in Stephen Collins. On the outside he is a Nice Guy, a calm, quiet man, deeply saddened and sorry for what has happened, contrite and ashamed of what he has done. However, when something happens to make him angry he can turn into a self-righteous hypocrite, attacking whoever is on hand with scathing and cruel insults, where he pushes any blame onto someone else.
The most telling example of his character is when he finds out that his wife started an affair after she separated from him when his own was revealed to the nation. What he says to both Anne and Cal show that he really thinks of both of them as pathetic, damaged, disgusting and inferior to him (remembering that he has been crying for sympathy from both of them from the very start), and then he comes home and bitches out his own son extensively, blaming both him and Anne for "looking at him sideways" and "driving him away", essentially neglecting him and making him commit the affair in the first place.
Moral Myopia: quite a bit of this going around. On an average everyday level, there is Stephen, who expects understanding and sacrifice from the people in his life when he has a year-long affair with his employee, yet has a tantrum when his own wife has an affair afterwards when they are separated, making those same people - e.g. his wife, who previously lied for him in a press conference to cover for his infidelity - suffer from his anger. On a criminal level there is oil and lobby executives as well as significant parliamentary figures who believe they are perfectly justified in destroying people's lives and/or killing them, while taking immediate offense (read: intimidation, threats and proactive steps) to people digging into their lives to discover the truth.
"She'd (Sonia) fallen in love with Collins. She'd gotten herself pregnant to him." This inspires the No-Holds-Barred Beatdown.
"Sonia meeting Paul Canning on a daily basis down at the Trocadero, telling him everything!" Cal doesn't realize the significance of this at first, but when he plays the tape back, he realizes only the Psycho for Hire knew this information, and the only way Stephen could know it is if he was the one who hired him.
Your Cheating Heart: The obvious one, of course, is the story set-up, Stephen screwing his young research assistant. Then Cal has an affair with Anne, Stephen's wife, which develops after Stephen's own affair is made public.