Who played Luke Danes in 'Gilmore Girls'?

Who played Lorelai Gilmore in 'Gilmore Girls'? In which TV series is Lorelai Gilmore a main character? Who played Rory Gilmore in 'Gilmore Girls'? In which TV series is Rory Gilmore a main character? In which TV series is Luke Danes a main character? Who played Gil Grissom in 'CSI: Crime Scene Investigation'? In which TV series is Gil Grissom a main character? Who played J.D. in 'Scrubs'?