George Clooney screen tested for the role of Jesse Mach. Clooney was creator Robert Wolterstorff's first choice but ABC did not want him.
There is only one actor of color in the cast. Other characters call him Nicky, but he is credited as Keith Damon.
At 35:35 the scene of a motorcycle cop approaching the Metropolitan Police Department is a reuse of a clip from the pilot. Watch for it in subsequent episodes.