Gaiety Theatre – The Mousetrap 2020 – Full cast announced

Adam Spiegel and Stephen Waley-Cohen present 




Gaiety Theatre March 30th-April 4th 2020


Tickets on sale now

The world renowned murder mystery The Mousetrap from Queen of Crime Dame Agatha Christie today announces further extensive dates for the hit UK tour which will return in 2020, opening at Poole Lighthouse from 21-25 January and then continuing to travel the length and breadth of the country until November 2020. 

Television star Susan Penhaligon (Bouquet of Barbed Wire, A Fine Romance, Emmerdale) who joined the tour in the summer, will play Mrs Boyle through to July 2020, with further casting to be announced in due course. Following the success of the first-ever UK tour in 2012, the timeless thriller returned to the road by popular demand in January 2019 and has been earning standout reviews from critics and public alike. Directed by Gareth Armstrong, the tour will visit more than 80 venues in total as it continues throughout 2020. 

Now in its 68th year, The Mousetrap continues a record-breaking run in the West End where it recently celebrated its 28,000th performance at the St Martin’s Theatre. First seen in Nottingham in 1952 starring Richard Attenborough and his wife Sheila Sim, The Mousetrap went on to become the world’s longest-running stage production following its West End transfer to The Ambassadors in 1952 and St Martin’s in 1973 where it has played ever since.  

The full cast includes Susan Penhaligon (Mrs Boyle), Martin Allanson (Detective Sgt. Trotter), Laura Costello (Miss Casewell), Steven Elliott (Mr Paravicini), John Griffiths (Major Metcalf), Edith Kirkwood (Mollie Ralston), Adam Lilley (Giles Ralston) and George Naylor (Christopher Wren). 

Gareth Armstrong (Director) has worked across the world as both a director and actor. He was an Artistic Director of Cardiff’s Sherman Theatre where he directed classics including Shakespeare, Shaw and Chekov and modern works from Coward to Stoppard. He is a founding director of the Made in Wales Stage Company and previously an Associate Artist Director at the Salisbury Playhouse. Gareth most recently directed Hugh Whitemore’s Sand in the Sandwiches seen in the West End and on UK tour. He has written and performed his own solo play, Shylock, which premiered at the Salisbury Playhouse and toured internationally for ten years. 

Susan Penhaligon (Mrs Boyle) is well-known for her role in the ITV drama Bouquet of Barbed Wire, as Helen Barker in the ITV sitcom A Fine Romance, and as Jean Hope in Emmerdale. She has toured the UK with stage productions including The Importance of being Earnest, Cabaret, Rehearsal for Murder, And Then There Were None, The Constant Wife, Verdict and Dangerous Obsessions. Stage credits also include Caste (Finborough Theatre), Murder on Air (Theatre Royal Windsor), Broken Glass (West Yorkshire Playhouse), The Compliant Love (Palace Theatre) and The Cherry Orchard (Royal Exchange). Susan has also appeared on film in Top Dog, Citizen Versus Kane, Say that You Love Me, Say Hello to Yesterday and Private Road

Martin Allanson’s (Detective Sgt. Trotter) theatre credits include: Wuthering Heights (Birmingham Rep & UK Tour), Coco (Sadler’s Wells), 55 Days and Fabrika Hill (Hampstead Theatre), Riot (National Theatre Studio), How The Vote Was Won (Orange Tree Theatre), Bouncers (Guildford Fringe), Lee Harvey Oswald (Finborough Theatre), Tomorrow/Seppuku (Arcola Theatre), Machine Gunners (Polka Theatre), In an Instant and Christmas (Theatre 503), His Face, Her Face (Bath Theatre). Television includes Doctors, Hashtag, Tosh, The Private Life of Monarchs

Laura Costello (Miss Casewell) recently graduated from The Oxford School of Drama. Credits include: Sandy in Flashes (Soho Theatre); LV in the Rise and Fall of Little Voice; Fanny Willoughby in Quality Street; and Annie in Chicago (Pitlochry Festival Theatre Rep 2018 Company), Eliza in The Tide Jetty (Eastern Angels tour).

Steven Elliott’s (Mr Paravicini) theatre credits include Danny Boyle’s production of Frankenstein and Sir Nicholas Hytner’s The Winter’s Tale plus other productions during his seasons at the Royal National Theatre. David Edgar’s Pentecost and A Christmas Carol amongst others at the Royal Shakespeare Company, and Professor Marcus in The Ladykillers (UK tour). Steven is an Associate Artist at Theatr Clwyd and has performed with many other theatre companies such as National Theatre Wales and Abbey Theatre in Dublin. Television credits include The Crown, Da Vinci’s Demons, Holby City, Inspector Morse, Judge John Deed and S4C’s Porthpenwaig. Film includes The Watcher in the Woods, Les Misérables, Hamlet, Time Bandits and NT Live recordings of King Lear, True West and Frankenstein. 

John Griffiths’ (Major Metcalf) West End theatre credits include The Sound of Music (London Palladium), The Woman in White (Palace Theatre), The Royal Family (Haymarket), The Phantom of the Opera (Her Majesty’s) and Oliver! (Aldwych). He has also appeared in the national tour of Chitty Chitty Bang Bang as well as Volpone at the National Theatre and The Tempest, A Midsummer Night’s Dream, Kiss Me Kate and Gentlemen Prefer Blondes at Regent’s Park Open Air Theatre. John is delighted to be touring for the second successive year in The Mousetrap UK Tour. 

Edith Kirkwood (Mollie Ralston) has starred in Macbeth, A Midsummer Night’s Dream (Shakespeare’s Rose Theatre), Peculiar Distractions (York Theatre Royal), The Princess and the Sprout, Billy Shakes: Wonder Boy, Peter Pan in the Park, Three (Wrongsemble), Austen the Musical (Old Hall Theatre), Simeon’s Watch, Baked Alaska, Inheritance, Fantastic Acts (Riding Lights), Blood and Chocolate (Slung Low/Pilot), The Star Child (Tell Tale Theatre), York Mysteries 2012, Two Planks and a Passion (York Theatre Royal/Riding Lights). Edith is also Associate Artist for Leeds based family theatre company Wrongsemble. 

Adam Lilley (Giles Ralston) most recently appeared in the 2019 UK tour of Rain Man and previously in the West End in The 39 Steps and The King’s Speech. His other theatre credits include Gaslight (UK tour); Dangerous Obsession (English Theatre of Hamburg); Encounter (Above The Stag Theatre, London), Maurice (Off-West End Award nomination for Best Male Performance Above The Stag Theatre, London) As You Like It and The Comedy of Errors (Guildford Shakespeare Company). TV and screen credits include: Autopsy: The Last Hours of Larry Hagman, Queers, Final Hours, A Violent Mind. 

George Naylor’s (Christopher Wren) theatre credits include: One Man Two Guvnors (Torch Theatre); Wendy and Peter Pan (Lyceum Theatre Edinburgh); Much Ado About Nothing (Heartbreak Productions); The Rover, Conspiracy, Madness in Valencia, The Taming of the Shrew, London Cuckolds (The Richard Burton Company); Boys (Open Letter Theatre Company) and Macbeth (Guildford Shakespeare Company). Television credits include: Web of Lies and Casualty

“One of the most skillfully written murder mysteries ever produced.”

New York Times

“The cleverest murder mystery of the British theatre. I think ‘The Mousetrap’ could run forever.”

Daily Telegraph

“A truly entertaining classic thriller” The Sunday Times

“Deservedly a classic among murder thrillers” The Observer

The Mousetrap continues its open-ended run at St. Martin’s Theatre, London. 




Booking information:

Dates: 30th March to 4th April – Mon to Sat 7.30 pm. Wed and Sat matinee 2.30 pm

Tickets: From €21 on sale now

Running time approx. 2 hours 20 mins


Booking details:

Gaiety Theatre Box Office South King Street, Dublin 2. 10am–7 pm/Mon-Sat (subject to performance schedule)

24hr Gaiety Theatre Booking Tel: 08 18 719 388  

Group Sales +353 (1) 646 8687 

Wheelchair & Box Bookings +353 (1) 679 5622   


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