Ian Reed Kesler

When Leonard and Sheldon find out that Professor Proton, the host of a TV science show they watched as children, can be booked for private parties, they hire him to come to their flat and entertain them.

The team discover that the bizarre death of a Marine and his two friends may be linked to their past, but it is Gibbs who ends up taking a trip down memory lane.

Suspected of assaulting and killing a boy in Central Park, a known paedophile faces a sensationalised media storm as the state pursues him. An attorney takes on the defence case.

An aspiring singer is murdered, and as Brennan and Booth investigate the musician's fans and foes, one obsessed woman transfers her affections to Booth.

A handsome businessman returns Caroline and Max's cat Nancy, who it turns out comes with a big surprise.

The gang's high school reunion has come at last; each of them recalls the events that shaped them into the people they are now.