Please check the episodes that you have already watched:

House

How I met your mother
S03E20 Miracles - 5/19/2008 8:00:00 PM
S03E19 Everything Must Go - 5/12/2008 8:00:00 PM
S03E18 Rebound Bro - 5/5/2008 8:00:00 PM
S03E17 The Goat - 4/28/2008 8:00:00 PM
S03E16 Sandcastles In The Sand - 4/21/2008 8:00:00 PM
S03E15 The Simmons Report - 4/14/2008 8:00:00 PM
S03E14 The Bracket - 3/31/2008 8:00:00 PM
S03E13 Ten Sessions - 3/24/2008 8:00:00 PM
S03E12 No Tomorrow - 3/17/2008 8:00:00 PM
S03E11 The Platinum Rule - 12/10/2007 8:00:00 PM
S03E10 The Yips - 11/26/2007 8:00:00 PM
S03E09 Slapsgiving - 11/19/2007 8:00:00 PM
S03E08 Spoiler Alert - 11/12/2007 8:00:00 PM
S03E07 Dowisetrepla - 11/5/2007 8:00:00 PM
S03E06 I'm Not That Guy - 10/29/2007 8:00:00 PM
S03E05 How I Met Everyone Else - 10/22/2007 8:00:00 PM
S03E04 Little Boys - 10/15/2007 8:00:00 PM
S03E03 Third Wheel - 10/8/2007 8:00:00 PM
S03E02 We're Not From Here - 10/1/2007 8:00:00 PM
S03E01 Wait For It - 9/25/2007 8:00:00 PM

Supernatural
S03E16 No Rest For The Wicked - 5/15/2008 9:00:00 PM
S03E15 Time Is On My Side - 5/8/2008 9:00:00 PM
S03E14 Long Distance Caller - 5/1/2008 9:00:00 PM
S03E13 Ghostfacers - 4/24/2008 9:00:00 PM
S03E12 Jus In Bello - 2/21/2008 9:00:00 PM
S03E11 Mystery Spot - 2/14/2008 9:00:00 PM
S03E10 Dream a Little Dream of Me - 2/7/2008 9:00:00 PM
S03E09 Malleus Maleficarum - 1/31/2008 9:00:00 PM
S03E08 A Very Supernatural Christmas - 12/13/2007 9:00:00 PM
S03E07 Fresh Blood - 11/15/2007 9:00:00 PM
S03E06 Red Sky At Morning - 11/8/2007 9:00:00 PM
S03E05 Bedtime Stories - 11/1/2007 9:00:00 PM
S03E04 Sin City - 10/25/2007 9:00:00 PM
S03E03 Bad Day At Black Rock - 10/18/2007 9:00:00 PM
S03E02 The Kids Are Alright - 10/11/2007 9:00:00 PM
S03E01 The Magnificent Seven - 10/4/2007 9:00:00 PM

Torchwood
S02E13 Exit Wounds - 4/4/2008 10:00:00 PM

Bones
S03E15 The Pain In The Heart - 5/19/2008 8:00:00 PM
S03E14 Wannabe in the Weeds - 5/12/2008 8:00:00 PM
S03E13 The Verdict In The Story - 5/5/2008 8:00:00 PM
S03E12 Baby in the Bough[ - 4/28/2008 8:00:00 PM
S03E11 Player Under Pressure - 4/21/2008 8:00:00 PM
S03E10 The Man in the Mud - 4/14/2008 8:00:00 PM
S03E09 The Santa in the Slush - 11/27/2007 8:00:00 PM
S03E08 The Knight on the Grid - 11/20/2007 8:00:00 PM
S03E07 Boy in the Time Capsule - 11/13/2007 8:00:00 PM
S03E06 Intern in the Incinerator - 11/6/2007 8:00:00 PM
S03E05 Mummy in the Maze - 10/30/2007 8:00:00 PM
S03E04 The Secret in the Soil - 10/23/2007 8:00:00 PM
S03E03 Death in the Saddle - 10/9/2007 8:00:00 PM
S03E02 Soccer Mom in the Mini-Van - 10/2/2007 8:00:00 PM
S03E01 The Widow's Son in the Windshield - 9/25/2007 8:00:00 PM

Doctor Who
S04E13 Journey's End - 7/5/2008 5:15:00 PM
S04E12 The Stolen Earth - 6/28/2008 5:15:00 PM
S04E11 Turn Left - 6/21/2008 5:15:00 PM
S04E10 Midnight - 6/14/2008 5:15:00 PM
S04E09 Forest of the Dead - 6/7/2008 5:15:00 PM
S04E08 Silence in the Library - 5/31/2008 5:15:00 PM
S04E07 The Unicorn and the Wasp - 5/17/2008 5:15:00 PM
S04E06 The Doctor's Daughter - 5/10/2008 5:15:00 PM
S04E05 The Poison Sky - 5/3/2008 5:15:00 PM
S04E04 The Sontaran Stratagem - 4/26/2008 5:15:00 PM
S04E03 Planet of the Ood - 4/19/2008 5:15:00 PM
S04E02 The Fires of Pompeii - 4/12/2008 5:15:00 PM
S04E01 Partners in Crime - 4/5/2008 5:15:00 PM

Battlestar Galactica
S04E09 The Hub - 6/3/2008 10:00:00 PM
S04E08 Sine Qua Non - 5/30/2008 10:00:00 PM
S04E07 Guess What's Coming to Dinner? - 5/16/2008 10:00:00 PM
S04E06 Faith - 5/9/2008 10:00:00 PM
S04E05 The Road Less Traveled - 5/2/2008 10:00:00 PM
S04E04 Escape Velocity - 4/25/2008 10:00:00 PM
S04E03 The Ties That Bind - 4/18/2008 10:00:00 PM
S04E02 Six of One - 4/11/2008 10:00:00 PM
S04E01 He That Believeth in Me - 4/4/2008 10:00:00 PM