Emmy award-winning TV producer Sarah Caplan , who worked on series including “Felicity,” “Lost” and “Crazy Ex-Girlfriend, died April 30 at Dignitas in Zurich, three years after being diagnosed with Alzheimer’s. She was 73. Her daughter, Stella Stahl, said in a statement, “In December, when it became clear the treatment she was undergoing wasn’t making an impact and her disease was progressing more rapidly than anticipated, she asked for my help fulfilling her wish to end her life with dignity and grace in Switzerland. And so, without hesitation, I did. She passed away peacefully on Thursday, April 30th, at Dignitas in Zurich. It was the most Sarah Caplan way to leave this world.” Born in London, Caplan earned a B.A. in philosophy from Bedford College, University of London and a Masters in South East Asian studies from SOAS, University of London.…