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In the conclusion of a two-part story, Sipowicz (Dennis Franz) continues to fret over his son Theo's bone-marrow test. Diane (Kim Delaney) confronts Jill (Andrea Thompson), forcing Jill to reveal why she has hidden the knowledge that her drug-running ex-husband, Don (Erich Anderson), is still alive. And in a tension-laden climax, Sorenson (Rick Schroder) prepares to nab Don, while Medavoy (Gordon Clapp) and Jones (Henry Simmons) set their sights on corrupt drug cop Denby (Scott Cohen). "The Last Round Up" and the preceding episode "Bats Off to Larry" were originally telecast as a single two-hour "special" episode, which served as NYPD Blue's seventh season finale -- not to mention the series swan song for actress Andrea Thompson.