In which TV series is Dana Scully a main character?

In which TV series is Mr. Feeny a main character? Who played Fox Mulder in 'The X-Files'? In which TV series is Fox Mulder a main character? Who played Dana Scully in 'The X-Files'? Who played Frasier Crane in 'Frasier'? Who played Niles Crane in 'Frasier'? In which TV series is Niles Crane a main character? Who played Daphne Moon in 'Frasier'?