Main Characters Dr. Nikki Alexander 171 main appearances Prof. Leo Dalton 106 main appearances Jack Hodgson 95 main appearances Dr. Harry Cunningham 94 main appearances Prof. Samantha "Sam" Ryan 60 main appearances Clarissa Mullery 59 main appearances Dr. Thomas Chamberlain 49 main appearances Trevor Stewart 24 main appearances Cara Connelly 16 main appearances Professor Gabriel Folukoya 20 main appearances Velvy Schur 20 main appearances Simone Tyler 10 main appearances Dr. Adam Yuen 4 main appearances
Recurring Guest Characters Taliban Prisoner 2 guest appearances Scott Lambert 2 guest appearances Stella Hancock 2 guest appearances Agency Nurse 2 guest appearances David Loader 2 guest appearances DI Bob Cherry 2 guest appearances James Embleton 2 guest appearances Peter Hancock 2 guest appearances Derren Blackburn 2013 2 guest appearances Tom Hancock 2 guest appearances Sir William Embleton 2 guest appearances Alison Ryder 2 guest appearances George Ryder 2 guest appearances Kristen 2 guest appearances Brian Blackburn 2 guest appearances Janice Masters 2 guest appearances DI Kate Warren 2 guest appearances DCC Tony Warren 2 guest appearances Simon Marshall 2 guest appearances Alan Lane 2 guest appearances ⇤ « 5 6 7 8 9 10 11 12 13 14 » ⇥