Jed Mercurio offers the first sustained critical study of one of the most influential television writers and producers of the twenty-first century. It examines how Mercurio’s authorial signature has developed across three decades of British television, from early medical dramas to record-breaking thrillers. Tracing his work from Cardiac Arrest through genre-spanning projects including sitcom, medical drama and political thriller, the book analyses how Mercurio’s writing engages with questions of power, populism, masculinity and institutional authority. It situates his career within shifts in broadcasting, streaming and production culture, paying close attention to his sustained commitment to public-service television. By examining Mercurio’s roles as writer, producer and executive producer, the study complicates established accounts of television authorship and offers new perspectives on contemporary British television, genre evolution and showrunning practice.