This collection of 51 essays contains rich memories of Singapore's broadcasting pioneers based in their station atop Caldecott Hill. ON AIR captures the breadth and depth of their experiences over 82 years on the Hill; from the founding in 1936 of the British Malayan Broadcasting Corporation, to Radio and Television Singapore (RTS), to Singapore Broadcasting Corporation (SBC), and finally to what is today, Mediacorp. In this book, the writrers have recorded eight decades worth of work experiences and have shared untold stories from the Japanese Occupation of Caldecott Hill, to the fascinating behind-the-scenes happenings that cast light and well known and well loved shows. Illustrated with rare, archival photographs, many not seen before, this publication is the first of its kind that gives an insight into the development of broadcasting in Singapore.