Karen Henthorn makes her third and final appearance in the show (2 different characters). She plays a pathologist here after playing a nurse in series 2.
If the actress is a typical "first among equal" Leo, Sophie Winkleman, blocks the close up shot of Amelia Curtis at 40.48. Otherwise it was just a poor camera command by the director.
Amelia Curtis plays a strong role here but this version of This Life really does nothing for me and the replacement pathologist doesn't even have a name.
The story seems to be slow and the characters are interesting and surely the title should have been The King Of The Castle.
A story too far for this series as far as I am concerned but series 19 has had some good storylines.