Richards return has to be a flashback/prequel surely, maybe he appears in a video relating to a new case? it's light and humorous but bound in reality
Ben Miller was the best one as it was originally a "fish out of water" premise, next best was ardal as I loved his warm character. I also enjoyed his relationship with the commissioner.
A lot of the cast has changed, they would need all the original cast not if it pertains to his role back in the Uk, then none of the original cast would figure in that.
Camille is also coming back so it could be flashbacks with just her and the commissioner
Also true, LOVE Camille!
But yes there is sadly potential for a "jumping the shark" scenario which I really hope they don't do and screw it all up!
I wonder if Camille sees Richard at all the crime scenes and has him helping her (in her head) solving all the crimes. Sort of how Sam could see Al in Quantum Leap but no one else could
Totally different series, but the "seeing ghosts" thing is possible, anyone here watch rizzoli and isles? After Barry frosts death, Jane "saw" him in various places and his vision led her to clues but it was played in a, it could just be Jane noticing clues and attaching a vision of her deceased colleague to it in her own mind because she's grieving. It was beautifully done and so true to how many of us are following a bereavement especially a shock one. Respectful to the memory of Lee Thompson Young.
Never took to Madeline, a poor Camille sub.
@PolkadotsAndMoonbeams some of us are old enough to remember rising damp and cats eyes! Don is a fantastic and very underrated actor, would love to see him in more tv and film, think he'd make an excellent M in James Bond for example, but he seems to prefer theatre and voiceover work.
I think he's aged very well! I think he's still a very attractive and charismatic man!
PLEASE NO idris Elba, couldn't act his way out of a paper bag and really isn't as good looking as people make out
they're basically spiders in armour 
Ruby annoyed me at first but grew on me. Shame the actress made that decision to leave, hopefully onto another job, otherwise a foolish move I think.
Loving the idea of a "young Dwayne" character. Shame Danny John jules messed up with that twitter storm. Great actor I've loved since red dwarf and dd loved him as the storymaker and on MI High.
Love the idea of seeing a young man having a change in character due to doing the job and interacting with the other characters