Recurring Guest Characters Puppet Show Host 1 guest appearances Dr. Christina Markham 1 guest appearances Sheriff Grady Markham 1 guest appearances Dep. Middleton 1 guest appearances Helen 1 guest appearances Young Helen 1 guest appearances Sylvia 1 guest appearances Young Sylvia 1 guest appearances Young Gerry 1 guest appearances Young Lucy 1 guest appearances Dr. O'Keefe 1 guest appearances Peter 1 guest appearances Administrator 1 guest appearances Deputy 1 guest appearances Virginia Masters 1 guest appearances Alien 1 guest appearances Gerry 1 guest appearances Chief Weapons Officer 1 guest appearances Cadet 1 guest appearances Boromir 1 guest appearances ⇤ « 8 9 10 11 12 13 14 15 16 17 » ⇥