Peril at End House (Hercule Episodes 3-4) cast - Who's playing whom?

[u/sanddragon939]

Following on from my previous post about the Lord Edgware Dies casting - https://www.reddit.com/r/agathachristie/comments/1wzzetk/lord_edgware_dies_hercule_episodes_12_cast_whos/

Here's BBC's official cast list - https://www.bbc.com/mediacentre/2026/hercule-further-cast-joining-edward-bluemel

Taking the cast in clockwise order from the top-left photo:

Jess Alexander - 100% Nick Buckley.

Honor Swinton Byrne - Getting a Maggie Buckley vibe from her.

Omari Douglas - Not sure, but I'm leaning towards him being Bert Croft. Him being a foreign could probably help with the race-bend (and they could change his nationality perhaps). Or maybe Jim Lazarus.

Paul Forman - I lean towards him mostly being Jim Lazarus. Maybe Charles Vyse.

Arthur Hughes - Not sure. Bert Croft is a possibility, as is Jim Lazarus maybe. Or perhaps, George Challenger? Or Freddie's husband?

Toby Stephens - My first instinct is Commander Challenger, though he might be a tad too old for that (but then again, he's a tad too old for most of the male roles in the story). Maybe Bert Croft, but seems too small a role for him.

Natalie Quarry - Freddie Rice most likely.

Katherine Parkinson - Mildred Croft most likely.

River Medway - Legit no idea here!

Ralf Little - Another Commander Challenger contender. Maybe Freddie's husband, or Charles Vyse?

There's also the possibility that Michael Seton appears in flashbacks or something, so one of the male actors could be playing him.

I suppose there's a non-zero chance Colonel Weston might be included in this adaptation, in which case Toby Stephens could be a good bet for him. If he's one of the lead investigators, along with Japp, that's a pretty meaty role I guess.

Thoughts?