Movies
* The Lady Vanishes (1938): Her film debut, playing a small role as a young woman in a train compartment.
* The Stars Look Down (1939): Played a supporting role as Elsie.
* The Black Cat (1934): Played a minor role as a young woman.
* The Mystery of Edwin Drood (1935): Played the role of Rosa Bud.
* The Silent Passenger (1935): Played a role in this British thriller.
* The Mill on the Floss (1937): Played the role of Maggie Tulliver, one of her more prominent film roles.
Television
* The Adventures of Robin Hood (1955-1959): Played the role of Lady Marian in this classic television series.
* The Adventures of Sir Lancelot (1956-1957): Appeared in several episodes.
It is important to note that Lena Martell's career spanned several decades, and she appeared in many other films and television productions, often in supporting roles. You can find a more comprehensive list of her work on websites like IMDb.