Mary Kills People
3 Series, 17 Episodes
Mel and her sister Maggie are devastated when their mother dies in an accident and a secret older sibling, Macy, turns up. With emotions running high, all three start to exhibit amazing new abilities.
The sisters are confused after getting a message instructing them not to trust Harry, so they concoct a plan to find out the truth. Maggie gets caught in the middle when Mel and Macy fall out.
The sisters devise a plan to identify the Harbinger, the demon responsible for the attack at Macy's laboratory. Mel uses her magic irresponsibly. Maggie volunteers to throw a Halloween party.
The sisters keep a watchful eye on their dangerous new charge, but when Charity, one of The Elders, appears and gives specific instructions on how to handle the situation, Mel doesn't agree with her
Mel is worried about Niko's safety, so she and Harry come up with a plan to protect her, but Mel will need her sisters' aid. Maggie helps Macy investigate Galvin's new relationship.
As Maggie tries to make amends with Lucy, she realises there is a new Kappa sorority member she isn't familiar with and enlists Mel's help to find out what's going on. Macy is given a cryptic message.
Harry informs the sisters that Hilltowne has experienced a hellquake. The Charmed Ones must fight a shadowy demon that is trying to obtain a collection of powerful magical artefacts.
Mel scours The Book of Shadows as Harry and Charity cross reference any clues that might lead them to new demon Jada. Macy goes outside her comfort zone after a little encouragement from Maggie.
Mel turns to Harry for guidance after learning information about the magical world that leaves her confused. Maggie tries to keep her mother's Christmas traditions alive. Galvin shows up to see Macy.
The sisters turn to The Elders for advice about Harry, but Mel is fed up with their rules and asks Jada for help without telling her siblings. They get a plan in place but face an unexpected threat.
Macy shares the new information she has learned with her sisters but is thrown by their reaction to the news. Maggie tries out for an acapella group. Mel unexpectedly runs into a figure from her past.
Macy summons up a necromancer, putting herself and Maggie in harm's way. Maggie attends a fraternity party to get over Parker. Mel tries to help Harry, who is struggling with regained memories.
Parker tips off Maggie about a mysterious death on campus and the creature responsible turns out to be a pixie in human form. Galvin recalls a detail from his grandmother's tales that could help Macy.
Macy loses herself in her favourite TV show, but things take a weird and dangerous turn. Mel and Jada enlist Niko's help to find out who might be after Jada. Maggie and Parker take an important step.
Maggie shows Macy, Harry and Charity the strange room under Vera Manor, but they quickly learn just how dangerous it is when Mel and Maggie switch bodies and powers. Macy asks The Elders for guidance.
Macy can't trust herself due to her memory lapses, so she asks Harry and Charity for help, but she's stronger than she thought. Worried about Macy, Mel and Maggie turn to an unexpected source for aid.
Niko reaches out to Mel for help and unknowingly reveals a new demon. Harry faces the consequences of the 'gift' The Elders have bestowed on him. Maggie has an idea about how to make Parker better.
A substitute Whitelighter named Tessa surprises the sisters after Harry mysteriously disappears. Macy must tell Galvin her decision about her demon side. Maggie wonders how she can pay for college.
The sisters devise a plan to locate Harry but need Tessa's help. Parker is close to conquering his demon side. Niko is eager to assist Mel, but in return she asks for help finding out about her past.
The Elders feel their lives are still in danger, so the sisters and Harry band together to try to stop the evil. Mel and Maggie grow concerned when Macy starts to tap more easily into her demon side.
Galvin discovers something bizarre is happening with the patients who are being brought into the hospital. Meanwhile, Maggie obtains a clue about how to keep The Source from taking over.
Maggie, Mel and Harry become wary of Macy's newfound power. Meanwhile, Macy keeps creating alternate realities, but they don't turn out to be the perfect versions of life she was hoping for.