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.
After a kidnapped petty officer escapes her captor, NCIS uncovers a connection to her missing husband. Also, Abby knits the NCIS newbies personalised gifts.
As members of the CSI team search for a cannibalistic killer, they realise they are pursuing more than one person.
