Law & Order: Sideshow (1999)

The then-current efforts to impeach President Bill Clinton were clearly the inspiration of this episode, the first in a two-part story. A Baltimore official is murdered in New York's Battery Park, compelling the NYPD's Briscoe (Jerry Orbach) and Curtis (Benjamin Bratt) to work side by side with Baltimore homicide cops John Munch (Richard Belzer) and Rene Sheppard (Michael Michele). It turns out that the victim was killed on Munch and Sheppard's home turf before being dumped in Briscoe and Curtis' backyard. The ensuing investigation involves a high-level Washington cover-up, a lesbian romance, and an FBI-protected witness, culminating in a clash between ADA Jack McCoy (Sam Waterston) and duplicitous Independent Counsel William Dell (George Hearn, who, coincidentally, bears a strong physical resemblance to the redoubtable Kenneth Starr). This two-parter was Law & Order's third and final crossover with the NBC crime drama Homicide: Life on the Street; the conclusion originally aired as an installment of Homicide February 19, 1999. ~ Hal Erickson, Rovi