Tom Ayers

Ted and Robin are surprised to bump into Barney when they volunteer at a homeless refuge during Thanksgiving. Lily's nerves are tested when she goes for Thanksgiving dinner at her future in-laws' house.

Hal is inadvertently responsible for a toxic chemical spill that forces a neighbourhood evacuation, Malcolm deals with being grounded, and Francis suffers through a date with a geeky 12-year-old.

After Torres and Bishop are in a car accident with a hit-and-run driver, Torres fights for her life in the intensive care unit.

Sheldon learns the university is building a database without him; Mary takes care of a bedridden Mandy and Meemaw.

The NCIS team investigates an F-18 crash and the subsequent disappearance of the pilot; McGee reluctantly discusses a very personal decision with his teammates.

The team investigate when a mob of hooded criminals terrorise the city by surrounding and beating up tourists. When Greg intervenes in one of the attacks, he becomes the gang's next victim, and his brave actions have unforeseen and tragic consequences.