Who is Sylvia?

1 Eagles Sometimes Can't Fly 2 Color Her Missing 3 Return to Summer Grove 4 The Playground 5 A Question of Midnight 6 A Penny for the Peep Show 7 A Sleep in the Deep 8 Memory: Zero 9 The Nowhere Victim 10 The Sound of Darkness 11 Who Killed Me? 12 Missing: Sun and Sky 13 Tooth of the Serpent 14 Medal for a Hero 15 Walk With a Dead Man 16 A Chance at the Roses 17 Blind Mirror 18 Harlequin's Gold 19 Who is Sylvia? 20 Only One Death to a Customer 21 Fly, Little One 22 The Search for Darrell Andrews 23 Murder Revisited 24 War of Nerves 25 Once Upon a Saturday