All Creatures Great and Small stars Callum Woodhouse and Matthew Lewis have teamed up for Channel 5's new four-part drama, The Family Secret – and it sounds like a binge-watch waiting to happen. The Family Secret is the latest addition to Channel 5's ever-growing slate of gripping dramas, which seems to get better year on year, and it sounds like a must-watch. Not only is the plot immediately intriguing, but with the brilliant Matthew Lewis and Eleanor Tomlinson leading the series, it will no doubt be a compelling watch. © Channel 5 Filming is underway on the upcoming dramaWhat is The Family Secret about? © Getty Eleanor Tomlinson stars in the series as Amanda BlakefieldThe series is billed as a "gripping, psychological drama that asks: what if your past isn't what you think it is?".