American actress and theatre director who played Dr Kila Marr, the xenologist who destroys the Crystalline Entity in revenge for her son, in the Next Generation episode Silicon Avatar.
Ellen Geer is an American actress, the daughter of Will Geer, and for many years the artistic director of the Theatricum Botanicum in California. Her films include Harold and Maude.
In Silicon Avatar she plays Kila Marr, a scientist who has spent her career studying the Crystalline Entity since it killed her teenage son at Omicron Theta. She comes aboard the Enterprise-D distrusting Data, then warms to him when she learns he holds the colonists' journals and can speak in her son's voice.
When the crew at last make contact with the Entity, Marr alters the graviton beam and shatters it, ending her own career. Geer's performance carries the episode.