Ep 5. Rewitched

Unaware that she is being watched, Billie jeopardises the Charmed Ones' new lives when she uses her powers to save an innocent and is caught by Agent Murphy of Homeland Security, who has suspected all along that she and the "cousins" are involved in supernatural activities and that the Halliwell sisters are not dead. Meanwhile, Phoebe's overnight trip with Dex ends in marriage when she and Dex are put under a spell by Billie; and Piper and Paige organise a speed dating night at P3 to get the club back on its financial feet. Finally, the Charmed Ones and Leo permanently morph into their old identities and join forces with Agent Murphy.