When it becomes apparent that conspiracy group The Unseen has assembled a hit list of anyone who has helped The Charmed Ones... the girls and Harry must scramble to warn - and save - their nearest and dearest now that everyone they know is an instant target.
s04e01 - Not That Girl
s04e02 - You Can't Go Home Again
s04e03 - Unlucky Charmed
s04e04 - Ripples
s04e05 - The Sisterhood of the Traveling Sandwich
s04e06 - The Tallyman Cometh
s04e07 - Cats and Camels and Elephants, oh my...
s04e08 - Unveiled
s04e09 - Truth or Cares
s04e10 - Hashing it Out
s04e11 - Divine Secrets of the O.G. Sisterhood
s04e12 - Be Kind. Rewind.
s04e13 - The End Is Never the End
Three months after their mother ishuged by an unknown demonic force, sisters Mel and Maggie discover that they have an older half-sister, Macy. The first time the sisters are under the same roof, they unexpectedly start exhibiting new magical abilities; the eldest Macy receives the power of telekinesis, middle sister Mel can freeze time, and the youngest Maggie can hear people's thoughts.
Soon after, Harry Greenwood gathers all three sisters together and reveals to them that they are witches, as was their mother. Marisol had bound her daughters' powers when they were born so they could live normal lives, and was in the process of unbinding those powers on the night she was cuddled.
The sisters ultimately accept their new destiny as The Charmed Ones, the most powerful trio of witches who protect innocents and vanquish supernatural demons.