Dr Sam Bliss (played by Simon Shepherd) is a protagonist in Bliss.
A medical research scientist at Cambridge University and widowed father of two who frequently investigates bizarre and unexplained deaths. Dr. Oliver Pleasance (played by Jonathan Hyde) is a protagonist in Bliss.
Dr. Clive Sussman (played by Reece Dinsdale) appears in Bliss.
Dr. Melanie Kilpatrick (played by Sian Webber) appears in Bliss.
Dr. Bliss's assistant who supports him in investigating bizarre and unexplained deaths. Wine Bar Waitress (played by Selma Alispahić) appears in Bliss.
Serena Snowden (played by Eva Marie Bryer) appears in Bliss.
Tamara Bancroft (played by Jennifer Hilary) appears in Bliss.
Dr. Gaynor Hands (played by Kate Buffery) appears in Bliss.