Who played Daphne Moon in 'Frasier'?

In which TV series is Dana Scully a main character? Who played Frasier Crane in 'Frasier'? Who played Niles Crane in 'Frasier'? In which TV series is Niles Crane a main character? Who played Khadijah James in 'Living Single'? In which TV series is Khadijah James a main character? Who played Monica Geller in 'Friends'? In which TV series is Monica Geller a main character?