An example of each episode of Season 9 of Charmed:
9x01: The fear grows
Barbas returns to avenge the Charmed to kidnap Wyatt and Chris, Piper blackmails him to kill the sisters and Leo. Being defeated by Paige warns the sisters that the Apocalypse is coming.
9x02: The mysterious return of Jenny Gordon
Dan's niece Jenny returns to San Francisco to visit the sisters by surprise, but Paige discovers that Jenny is really a demon changes forms.
9x03: The Court of Paige Matthews
Paige is arrested by the board of Magic to convene a trial for a murder he did not commit, must prove his innocence Phoebe and Piper discover that Wyatt uses magic in front of mortals.
9x04: A fallen angel
An angel named Joseph falls from the sky by the decision of the Elders and goes to help the sisters, but you see the Angel of Death warning that soon will be punished to death without a reason.
9x05: For the love of a wicked woman (Part 1)
Christy is resurrected and wants to be an ally with the sisters, Leo and ends in love without knowing it was a trap and transported just 7 months in the future.
9x06: The trap of the Triads (Part 2)
Leo is transported to 7 months in the future and see that San Francisco is totally destroyed, all people have died and is plagued by demons. But not only that only the only survivor is Kyra.
9x07: The hidden prophecy
Leo sisters warn that the Apocalypse will soon come. The Triads have plans to release millions of demons vanquished by the Charmed to have revenge.
9x08: The master plan
In 1960, Barbas communicates through a dying woman possessed by Cole Turner giving a job to prepare the coming of the Apocalypse with the intention of releasing the devil
9x09: Hello, Apocalypse (Part 1)
Barbas he reports to the devil that this quite prepared for his liberation. The Elders it decides to take the sisters to the sky when the apocalypse this one for coming, Piper discovers that I Read works with Christy seeking to Barbas and to kill.
9x10: Hello, Apocalypse (Part 2)
Piper escapes from the sky to try to stop Leo not to kill Barbas while Christy Leo pressures him to kill with a dagger in the heart with success. But Christy told him that was a lie and apparently millions of demons are released and the devil too.