Ajgie Kirkland

This episode flashes back to the start of Sheldon and Leonard's friendship seven years previously and explains the housemate agreement and how Sheldon saved the lives of his friends.

With time running out to save the victims of a kidnapping ring before they are transported overseas, Jane and Lisbon zero in on the criminal enterprise's mastermind. Meanwhile, Lisbon decides if she will move to Washington DC with Agent Pike.

A musician is stabbed in a bar and the squad realises that the stabbing victim had something to hide. Meanwhile, Jane's father, who has been away for over a year, returns with shocking news.

The team reopens the 1970 murder case of a 20-year-old musician, Billy, who was secretly instrumental in creating the popular Philadelphia soul sound.