Series 1 (1996) This series introduces Professor Sam Ryan, portrayed by
Amanda Burton.
Series 2 (1997) Series 3 (1998) This is the last series set in Cambridge.
Series 4 (1999) This is the first series set in London. The location for Series 4 and 5 changes from each story.
Series 5 (2000–01) Series 6 (2002) This is the first series set at the Lyell Center in London. This series also saw the introduction of Dr. Leo Dalton and Dr. Harry Cunningham, portrayed by
William Gaminara and
Tom Ward, respectively.
Series 7 (2003) Series 8 (2004) This series saw the departure of Professor Sam Ryan in episode 2 and the introduction of new character Dr. Nikki Alexander, portrayed by
Emilia Fox, in episode 5.
Series 9 (2005) Series 10 (2006) Series 11 (2007) Series 12 (2008) Series 13 (2010) Series 14 (2011) Series 15 (2012) This series saw the departure of Dr Harry Cunningham at the end of the series (though off-screen). Note that this list is in order of first broadcast by the BBC. The BBC postponed the first broadcast of episode
And Then I Fell in Love for "editorial reasons" shortly before its intended broadcast and brought forward
Domestic in its place, eventually showing
And Then I Fell in Love four months later (after it had been shown in Australia). is:
Death Has No Dominion,
And Then I Fell in Love,
Paradise Lost,
Domestic,
Redhill,
Fear. Episodes originally in swapped places.
Series 16 (2013) This series saw the departure of Professor Leo Dalton at the end of the series. This series saw the introduction of forensic scientist Jack Hodgson portrayed by
David Caves. Forensic technician Clarissa Mullery portrayed by
Liz Carr was introduced in episode 2 as a recurring character.
Series 17 (2014) This series saw the introduction of Dr. Thomas Chaimberlain, portrayed by
Richard Lintern.
Series 18 (2015) Series 19 (2016) Clarissa Mullery was upgraded to a main character.
Series 20 (2017) Series 21 (2018) Series 22 (2019) Series 23 (2020) This series saw the departure of Dr. Thomas Chaimberlain and Clarissa Mullery at the end of the series.
Series 24 (2021) This series saw the introduction of Dr. Adam Yuen, portrayed by
Jason Wong, in episode 3, who departed at the end of episode 6. This series also saw the introduction of Dr. Simone Tyler, portrayed by
Genesis Lynea, in episode 7.
Series 25 (2022) This series saw the reintroduction of Professor Sam Ryan, again portrayed by
Amanda Burton, who departed at the end of the series. This series also saw the departure of Dr. Simone Tyler at the end of the series. Unlike the previous series, the twenty-fifth series features one story spread over six parts.
Series 26 (2023) This series saw the introduction of Professor Gabriel Folukoya and Velvy Schur, portrayed by Aki Omoshaybi and Alastair Michael, respectively. The series also saw the introduction of Cara Connelly, portrayed by Rhiannon May, in episode 3, who had previously been a recurring character in Series 24 and a guest character in Series 25.
Series 27 (2024) This series saw the departure of Professor Gabriel Folukoya, Velvy Schur and Cara Connelly at the end of the series (though all off-screen).
Series 28 (2025) This series saw the introduction of Professor Harriet Mavern, portrayed by
Maggie Steed. This series also saw the introduction of crime analyst Kit Brookes, portrayed by
Francesca Mills, in episode 2. This is the last series set at the Lyell Center in London. This is due to production moving to the West Midlands.
Series 29 (2026) This is the first series set at the Sir William Bowman Centre of Excellence in
Birmingham. The Enemy Within was meant to air as episodes 3 and 4, but was pushed back to episodes 5 and 6 due to events in Birmingham at the time. Creekwood was moved forward and aired in its original place. The DVD release has Creekwood as episodes 3 and 4, in line with the final broadcast order rather than the intended broadcast order. ==References==