Jill Tyrrell

Jill Tyrrell is the protagonist of the British black-comedy series Nighty Night. She's a selfish, petty, even dangerous woman who manages to destroy the lives of just about everyone she encounters.

Adultery
When Jill finds out her husband has cancer, she immediately signs up for a dating agency, where she meets her future toady Glen.

When Jill meets Don, she's instantly infatuated and repeatedley tries to seduce him. Despite Don not being a faithful husband, he's not the least bit interested in her.

Domestic Abuse
Jill tells everyone her husband succumbed to his cancer to score sympathy. When her husband's cancer goes into remission, Jill forces him to stay at home, never go outside and generally treats him little better than a farm animal. When keeping her husband hidden becomes too difficult to keep up, Jill poisons him. He survived, but is never seen again.

Jill treats her blind date Glen little better. She ropes him into helping her kill her husband and the vicar when he starts to suspect something, then makes Glen confess to the crimes before killing himself. Glen survives, but his confession lands him in an asylum.

Jill agrees to marry Glen, but only to inherit his money. She then tries to kill him but fails every time. Glen eventually gets tired of the abuse and comes after Jill, but she manages to elude him.

Fraud
Jill is a compulsive liar, telling everyone her husband was dead when he was only sick, framing Glen for the deaths of people she'd killed and telling everyone she was impregnated by a 12-year-old boy. It's her lying that compells Jill to commit nearly every act of villainy in the series.

Murder
Jill is a full-blown sociopath. She's attempted to kill her husband, a vicar, Glen and possibly succeeded in killing a rival for Don's affections.

Home-Wrecking
Jill tries to seduce Don with little consideration for his wife Cathy's feelings. When Don doesn't reciprocate, Jill tries turning Cathy against him and uses photos of a woman he'd once cheated with to make herself more attractive to him.