Sex Education confirms returning and new cast for season four - including this Schitt's Creek star

• Grab your pencils and prophylactics, kids, as it looks like we're finally heading back to Moordale! It's been announced that production on the highly-anticipated fourth season of hit Netflix series Sex Education has begun - with a huge new star in tow. MORE: Sex Education and Line of Duty stars team up for new period drama - and it looks amazing Taking to Twitter on Friday, the official account for the teen series, which has become one of the streaming site's biggest shows since launching back i