ISOSCELES... Pat Abernethy... Dave Marsden... ISOSCELES... 020 8946 3905


Pat Abernethy and Dave Marsden are two actors who have written, produced and performed their own shows for many years, originally based in Ireland, and since the eighties, in London. The main feature of the majority of their work then was that it was comedy based but mostly performed in theatres. If you click on COMEDY you will get a clearer picture of what their professional life looked like then.

Just prior to the millennium the renowned playwright and 'Emmerdale' creator, Kevin Laffan wrote two new plays for Pat and Dave, 'Odd Ball Out' and 'The Husband's Tale'  which were highly acclaimed critically.



From this time the duo, who have always performed under the name ISOSCELES, have moved back closer to their straight acting roots, and have worked closely with writer Patrick Prior and actor/director Jim Dunk (collectively known as Useful Idiots); the results have been the following productions:

2000 - Yours Truly, Jack the Ripper

2002 - On Our Way to Lisbon

2002 - The Haunters

2004 - Dracula the Panto

2006 - Dr Jekyll and Mr Hyde

2008 - The Bonzo Dog Doo Dah Band Changed My Life Forever
2010 - The Man Who Left The Titanic
2013 - The Vampire and Mrs Riley
2015 - Murder, Just What The Doctor Ordered

In 2005 Pat and Dave also premiered their own music show 'Songs That Matter'.
In 2009 ISOSCELES produced and performed 'Behind You! by Dave Marsden.

In 2011 Pat and Dave premiered another music show 'Probably The Best Comedy Songs In The World Ever, Maybe'.

2014 - Isosceles premiered a new show called 'BECKETT'S LAST ACT' adapted from the book of the same name by Mora Grey.

2017 - In November Isosceles will open a new show written by Patrick Prior called 'LITTLE VICKY AND THE SEVEN ASSASSINS'

The one thing that has never changed over the years is that every show is a brand new original production, and so far, past and present, there have been well over twenty.




Pat Abernethy

TV appearances include Young Indiana Jones Cronicles (USA), Timewatch (BBC), The Last Window Cleaner, Katie (BBC), The Burke Enigma, Kilmore House (RTE), Harry and Cosh (Channel 5) and numerous other TV productions (including Playschool). Films include Barry Lyndon, The Outsider, and Two Days, Nine Lives. Theatre work includes appearances at The Glasgow Citizens, Young Vic, Manchester Library Theatre, Theatre Clwyd, The Abbey Dublin, The Lyric Belfast and a long association with The Theatre Royal, Stratford East. Other work Includes extensive corporate role-plays for many top British companies as well as commercials and many voice overs for films. Pat has even written an Irish No 1 hit song, "I Believe in Love".

Dave Marsden

TV appearances include Young Indiana Jones Cronicles (USA), No Child of Mine (ITV). Film work includes The First Great Train Robbery and The Outsider as well as a wide range of voice over work on many films and TV productions. In the theatre Dave was a member of Jim Sheridan's famous Project Company in Dubiln and has also worked at The Lyric Belfast and The Theatre Royal, Stratford East. He's done extensive role-play work in training programmes for top British companies and appeared in many corporate videos. Dave is also a highly respected Musical Director as well as being a very popular after dinner speaker. As a playwright his new work 'Behind You!' was produced by Isosceles in December 2009 at Wimbledon Studio Theatre.