Illustrious and ignoble: twin studies -- Policies and people: separated by design -- How did it work?: inside the twin study -- Twin brothers with twin sisters: familiar strangers -- "The biggest thing in my life": Kathy and Betsy: -- 60 Minutes: media inquiry -- Dancing solo: Anne and Susan -- Identical, but not the same: Melanie and Ellen – Parallel paths: Howard and Doug – “Three versions of the very same song”: identical triplets -- Twinless again: Sharon Morello -- Unpublished or unavailable?: in search of the findings -- Yale University Press: the book that never was -- Not just a doppelgänger?: Justin Goldberg -- Artists from afar: Paula and Elyse -- Opportunities lost: Paula and Marjorie -- Fraternal, almost identical: Michele and Allison -- Letters of protest: Oscars and Emmys -- Professional standards: codes of conduct, legalities, and moralities -- Over or unfinished?: continuing controversies.