Katherine Baxter (Death in Paradise)

Katherine Baxter aka Katherine Lewis (Polly Kemp) is the hidden main villainess of "Man Overboard Part 2", episode 6.06 of BBC's Death in Paradise (airdate February 9, 2017). She is the mother of Steve Thomas, a business associate of a financial firm in London. 
DCI Humphrey Goodman and two of his police officers arrived in London due to finding evidence that linked the financial firm and the murder of a boatman, Tom Lewis, in Saint Marie. After meeting up with London's DCI Jack Mooney, they went on to investigate further. Suddenly, the company's director, Frank Henderson was found murdered in his office. His body was found by Katherine, who worked there as a caretaker. In the episode's denoument, Katherine was revealed to be the murderer of Frank Henderson and the mother of Steve, her conspirator. During Frank and his associate's visit to St. Marie, Steve killed Tom Lewis (who was revealed to be Steve's father and Katherine's husband) out of revenge for the boating accident that killed Steve's older brother John, with Steve harboring resentment towards his father for trying to save John rather than him. 
When Frank realized that Steve was Tom's murderer, he began to negotiate with him to confess to the police, leading the evil Katherine to shoot and kill Frank when he attempted to call the police. Steve staged the scene as a suicide and Katherine pretended to have discovered the body. While everyone focused their attention on Frank's dead body, Katherine placed the key into his office door to make it look like the office was locked, adding on to the suicide stage. The evidence that incriminated Katherine and Steve was Steve's birth certificate, which definitively proved that they were mother and son and that they conspired together to murder Frank Henderson. Exposed, Katherine held her son's hand tearily before being arrested (off-screen).
Category:2010s
Category:Alias
Category:Conspirator
Category:Hero's Lover
Category:Mother
Category:Live Action Villainess
Category:Murderer
Category:Murder: Gun
Category:Pistol
Category:Villainous Reveal
Category:Fate: Arrested