Most of the new releases are on show somewhere in Cornwall, although the north and east of the county is poorly served - Bude and Wadebridge being honourable exceptions. You can find a full listings service, with details of every movie at every cinema, on this page. There are also a few smaller, part-time cinema organisations in some of the more rural areas.
Hall For Cornwall
The Hall For Cornwall's website says it "is a thriving theatre in the heart of Truro, Cornwall. Staging everything from classical to rock concerts, and musicals to drama there is always something to see. In addition to national and international quality touring productions, the Hall’s stage hosts some of the best home-grown talent as well as development opportunities." Click here for details of current and upcoming attractions.
Most towns and many villages support enthusiastic amateur dramatic groups, often offering productions of surprisingly high quality and always good fun. You can find a comprehensive listings service here and here. The Amateur Theatre directory also maintains a listings service for Amateur Dramatic productions in Cornwall.