<Tr> <Td_colspan="8"> After being warned about the chamelion demon by Cole, Piper wants to give the source an agreement of peace . When Piper, Phoebe, and Paige go to vanquish a demon the source kidnap Piper and brain wash her . The Source sends Piper into a deep coma, where she perceives an alternate reality thanks to a demon named Alastair . Everyone in Pipers alternate reality plays on her deepest desire . Phoebe and Paige must find a way to return her to reality and save her from giving up their powers while she is delusional . Leo ultimately comes and heals pipers mind which brought her back to reality . </Td> </Tr> <Tr> <Th> 74 </Th> <Td> 8 </Td> <Td> "Black as Cole" </Td> <Td> Les Landau </Td> <Td> Abbey Campbell, Brad Kern & Nell Scovell </Td> <Td> November 15, 2001 (2001 - 11 - 15) </Td> <Td> 4301074 </Td> <Td> 5.1 </Td> </Tr> <Tr> <Td_colspan="8"> In the midst of mulling over his marriage proposal, Phoebe faces her inner demons while she also comes face - to - face with Cole's demonic past . When a demon from the brootherhood arises killing withces, A victim whose husband was killed by cole seeks revenge . The A.D.A lures one of Leo's charges revelaing his true identity . Cole embraces his demonic side completely to kill Saks . To being Cole's humanity back he strips his powers . Meanwhile, Paige encourages Piper and Leo to test their readiness to become parents . </Td> </Tr> <Tr> <Th> 75 </Th> <Td> 9 </Td> <Td> "Muse to My Ears" </Td> <Td> Joel J. Feigenbaum </Td> <Td> Krista Vernoff </Td> <Td> December 13, 2001 (2001 - 12 - 13) </Td> <Td> 4301075 </Td> <Td> 4.5 </Td> </Tr>

When does phoebe find out about cole being the source