Margaret Opalsen is a fictional character portrayed by Sorcha Cusack in the TV series Agatha Christie's Poirot.
In the first episode they appeared in, titled Jewel Robbery at the Grand Metropolitan (season 5), they were 43 years old.
They appear in 1 episodes out of a total of 70 aired
Episodes1
Jewel Robbery at the Grand Metropolitan
episode S5.E8 march 1993While Poirot vacations in Brighton to boost his health, the beautiful pearl necklace of a theatre actress staying at his hotel is mysteriously stolen.