The duplicitous Gideon (Gildart Jackson) conspires with the Darklighters to get rid of Leo (Brian Krause). As a result, Leo and Piper (Holly Marie Combs) are banished to the Ghostly plane, which may well prevent the birth of their future son, Chris (Drew Fuller) -- who in turn realizes he must be conceived immediately or his Whitelighter "self" will permanently vanish. Meanwhile, Phoebe (Alyssa Milano) and Paige (Rose McGowan) are convinced that Piper is dead, which definitely casts a pall over Wyatt's first birthday party. ~ Hal Erickson, Rovi