Who is Sylvia? (S03E19)

S03E01 Taking Stock S03E01 Eagles Sometimes Can't Fly S03E02 Partners S03E02 Color Her Missing S03E03 A Nose For Quality S03E03 Return to Summer Grove S03E04 The End Of The Line S03E04 The Playground S03E05 A Question of Midnight S03E05 The Welsh Connection S03E06 A Penny for the Peep Show S03E06 Not On The Same Wavelength S03E07 A Sleep in the Deep S03E08 Memory: Zero S03E09 The Nowhere Victim S03E10 The Sound of Darkness S03E11 Who Killed Me? S03E12 Missing: Sun and Sky S03E13 Tooth of the Serpent S03E14 Medal for a Hero S03E15 Walk With a Dead Man S03E16 A Chance at the Roses S03E17 Blind Mirror S03E18 Harlequin's Gold S03E19 Who is Sylvia? S03E20 Only One Death to a Customer S03E21 Fly, Little One S03E22 The Search for Darrell Andrews S03E23 Murder Revisited S03E24 War of Nerves S03E25 Once Upon a Saturday