Who played Fiona Gallagher in 'Shameless'?

Who played Nicholas Brody in 'Homeland'? In which TV series is Nicholas Brody a main character? Who played Frank Gallagher in 'Shameless'? In which TV series is Frank Gallagher a main character? In which TV series is Fiona Gallagher a main character? Who played Jess Day in 'New Girl'? In which TV series is Jess Day a main character? Who played Nick Miller in 'New Girl'?