Performer file
Anna Maxwell Martin
Yes — Anna Maxwell Martin played Arabella Heywood in Murder on St Malley's Day (Series 5, 2002).
In Midsomer Murders
Maxwell Martin plays Arabella Heywood in Murder on St Malley's Day. The school-linked story gives her an early screen credit before her breakthrough in prestige television drama.
Performer biography
Anna Maxwell Martin came to wide attention as Esther Summerson in the BBC adaptation of Bleak House, a performance recognised with a BAFTA Television Award. She subsequently led South Riding and played Julia in the comedy Motherland.
Her varied credits also include Line of Duty, The Bletchley Circle and stage work. She is particularly adept at moving between sharply observed comedy and tightly controlled dramatic performances.
Career background ↗Anna Maxwell Martin’s Midsomer roles
Anna Maxwell Martin’s Midsomer character is Arabella Heywood in Murder on St Malley’s Day. The school-linked investigation provides an early screen appearance before the later work described in her career profile. Arabella belongs to the guest cast of this case, not to the regular Barnaby household or Causton police team. The actor name, character name and episode title together give a precise answer when searching for the appearance. The Devington school story belongs to Tom Barnaby and Gavin Troy’s partnership.
The Casebook’s suggested rewatch angle is the school-centred setting and the social circle it brings into the investigation. Begin with the episode’s own premise, then notice how its guest characters are introduced around the institution. That leaves the specific explanation of the crime for the marked spoiler section. The cast source below supports the performer-to-role connection; the episode link adds the other actors and real filming places. Keep those questions separate from the actor’s wider biography, where recognition of later television work can otherwise obscure the small, particular identity of an earlier guest part.
The cases in context
Murder on St Malley's Day
Anna Maxwell Martin as Arabella Heywood · Series 5, Episode 4 (2002).
A prestigious school, a secret society and an annual sporting tradition produce a case steeped in privilege.
DCI Tom Barnaby investigates with DS Gavin Troy. Filming places for Murder on St Malley's Day →
Published episode credits
1 sourced episode as Arabella Heywood.