No she is not dead she has just gone through the anomanly everyone thinks she is dead but she is not. She will return in the new series.
no.
Helene Bevan died in 2001.
Helene Kottannerin died in 1470.
Helene Liebmann died in 1835.
Helene Lange died in 1930.
Helene Stöcker died in 1943.
Helene Wessel died in 1969.
Helene Rother died in 1999.
Helene Sedlmayr died in 1898.
Helene Jacobs died in 1993.
Helene Weber died in 1962.
Helene Demuth died in 1890.