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Promotional portrait of the cast of the television series, 'Hill Street Blues,' circa 1981. (Front, L-R) Michael Conrad, Barbara Bosson, Daniel J. Travanti, Veronica Hamel, Michael Warren. (Middle, L-R): James B. Sikking, Taurean Blaque, Rene Enriquez, Bruce Weitz, (Rear, L-R) Ed Molinaro, Betty Thomas and Joe Spano. (Photo by NBC Television/Getty Images)

Promotional portrait of the cast of the television series, 'Hill Street Blues,' circa 1981. (Front, L-R) Michael Conrad, Barbara Bosson, Daniel J. Travanti, Veronica Hamel, Michael Warren. (Middle, L-R): James B. Sikking, Taurean Blaque, Rene Enriquez, Bruce Weitz, (Rear, L-R) Ed Molinaro,  Betty Thomas and Joe Spano. (Photo by NBC Television/Getty Images)