At the Threshold of an Era cast is including:
Gallen Lo as Tim Yip (107 episodes), Sunny Chan as Michael Hui (107 episodes), Roger Kwok as Ma Chi Keung (107 episodes), Louis Koo as Nick Cheung (107 episodes), Kenix Kwok as Ivy Sum (107 episodes), Flora Chan as Helen Fok (107 episodes), Ada Choi as Ling Tin (107 episodes), Liza Wang as Liza Fong (107 episodes), Maggie Shiu as Tina Pang (107 episodes), Nicky Wu as Joe Yip (107 episodes), Paul Chun as Howard Yip (107 episodes), Joe Ma as Donald Yip (107 episodes)