Critical orthodoxies around the multi-camera television studio characterise it as a 'theatrical' space, driven by dialogue and performance. Troy Kennedy Martin (1964) decried television drama's essential naturalism, demanding a more filmic form of drama in a polemic which has strongly influenced critical thinking on multi-camera studio television. Caughie (2000) suggests that Armchair Theatre created a 'space for acting', but in the main, the studio is seen as a constraining and interiorising dramatic site, in thrall to liveness and reliant on theatrical unities. This article draws on research at the BBC Written Archives to extend current understanding of the determinants working upon multicamera, studio television up to and into the 1970s....