Love is in the air when Amy convinces Sheldon to join her, as well as Howard and Bernadette, for a romantic train trip to Napa Valley to celebrate Valentine's Day.
When a kidnapped officer escapes her captor, the team discover a strange connection to her missing husband; Abby knits gifts for the new members of NCIS.
As members of the CSI team search for a cannibalistic killer, they realise they are pursuing more than one person.
Sharon is enraged when Luke persuades Carlene to steal Sharon's Matron of Honor responsibilities and assign them to Amanda for her 'Gone With the Wind' inspired renewal of marital vows.
