William Powell-Blair
William Powell-Blair, born in Richmond, Virgina, has only one appearance in Star Trek. He played a Cardassian officer in the  first season episode .

Powell-Blair appeared on a 1980 episode of Growing Pains; other Trek actors to appear on the series were Andrew Koenig, who was a semi-regular, Cristine Rose (1991), Gregory Sierra (1989), Hallie Todd (1986) and Olivia d'Abo (1985 and 1986). Powell-Blair also appeared on a 1992 episode of Reasonable Doubts; other Trek actors to appear on the show are Benito Martinez (1992), Meg Foster (1992) and Jeri Ryan (1991).

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Performers
DS9 performers