Jack mentions that his former colleague (and lover) "Diane" Hawthorne has been called to testify before the independent counsel. In a previous episode, Trophy (1996), her name was "Diana", not Diane.
When a Metropolitan Police Department of the District of Columbia (MPD) police officer pulls up Chesley Purcell's criminal record, the mugshot pictured is from the New York Police Department, not the MPD. Why would the MPD have an NYPD mugshot in their records? Even if the suspect was previously arrested by the NYPD, the MPD would have taken its own photograph of her when they arrested her. Police departments don't rely on one another for mugshots; each takes its own pictures whenever someone is arrested.