David Caruso .......... Lieutenant Horatio 'H' Caine Emily Procter ......... Calleigh Duquesne Khandi Alexander ...... Doctor/ Chief Medical Examiner Alexx Woods Adam Rodriguez ........ Eric Delko Rory Cochrane ......... Timothy Speedle (2002-2004) Kim Delaney ........... Megan Donner (2002) Jonathan Togo ......... Ryan Wolfe (2004-)