Her next BBC project is a "high energy" crime show that all fans will want to watch out for. The Cage has been described as "a high-stakes, high energy crime story set within the world of a Liverpool Casino" that has "two unforgettable characters at its heart". James Stack // BBCRelated: 6 of Sheridan Smith's most bingeworthy showsWhat's The Cage about? The Cage is yet to confirm a release date or a release window, though will air on BBC One and BBC iPlayer. The Cage is yet to confirm a release date, though it will air on BBC One and BBC iPlayer.