In which TV series is Frank Gallagher a main character?

Who played Carrie Mathison in 'Homeland'? Who played Nicholas Brody in 'Homeland'? In which TV series is Nicholas Brody a main character? Who played Frank Gallagher in 'Shameless'? Who played Fiona Gallagher in 'Shameless'? 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?