"What do you mean our power?" asked Piper. "Just how much do you think you know about us?"
"Quite a bit, actually," said Marcus. "Piper Halliwell Wyatt. Second of three sisters. A witch and one-third of the Charmed Ones. Your powers include freezing time and blowing things up. Owner and operator of a nightclub called P3 in San Francisco. Married to Leo Wyatt, a soldier who died in World War II and was subsequently returned to Earth as a White Lighter.
"Phoebe Halliwell. Youngest of the original Halliwell sisters. Currently employed as an advice columnist for the major newspaper in San Francisco. Your powers include premonitions and levitation. Recently married, and divorced, from one Cole Turner, who, we believe, is actually part demon. His current whereabouts are unknown.
"Paige Matthews. Half sister to the Halliwells. Your powers include orbing and the ability to orb objects. Recently you quit your job as a social worker for the Bay Area Social Services and spend most of your time at home. Your mother was the same mother as your sisters, but your father was Sam, whom we believe was really a White Lighter."
"You seem to know a lot about us," said Piper. "I'm not sure I like a bureaucrat knowing so much about us."
"You can trust him," said Amy. "He's not your typical bureaucrat."
"So, you trust him?" asked Phoebe.
"I almost have to," said Amy, smiling. "I've been married to him for nearly fifteen years."
"He's your husband?" asked Paige.
"Yes," said Marcus. "It's one of the reasons I was selected to be in charge here. I'm sort of an expert on witches and the occult."
"Just what agency is this?" asked Piper. "And what does it have to do with us?"
"It's called the Office of Paranormal and Supernatural Studies," said Marcus. "Officially, we investigate reported occurrences of a paranormal or supernatural nature. In reality, you might call us a research facility. We look for defenses and weapons we can use against the demons."
"Wait a minute," said Paige. "Isn't that our job?"
"Demons don't limit their activities strictly to witches," said Amy. "A lot of the time, they go against mortals who have no defenses against them. And no one can be everywhere."
"That's where we come in," said Marcus. "We've been able to design some defenses and weapons that have prove somewhat effective against demonic intrusions."
"So why do you need us?" asked Piper.
"We've come up against something that we've never encountered before," said Marcus. "Something far beyond anything we've experienced to date. It's starting to spread and if we don't find a way to stop it soon, it could wipe out every human being on the face of the Earth."