Big School BBC1, 9.30pm
New series. Return of the classroom comedy, starring David Walliams. When Miss Postern sets up a careers workshop, it seems her slogan ‘Which Way Now?’ applies as much to her as it does to the pupils, not least because the guest speaker is her old teacher-training colleague - and now bestselling children’s author - Fenella Forbes (Morgana Robinson). Meanwhile, her relationship with Mr Church has taken a downward turn after a misunderstanding over a date. On the upside, the future is looking bright for one member of staff, as Mr Martin prepares to launch a pop career.
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