TLC had aired a special where they go behind the scenes at local TV News operations at the time. Note KCBS, KCNC and WTVJ are featured in these specials at the time of release.
I can answer for the episode where KCBS-TV and CBS News Los Angeles offices are featured after this episode aired. KCBS-TV and CBS News LA Offices later move their operations out of Columbia Square to Studio City because it was a digital ready offices set up. When the Special aired KCBS-TV did not merge with KCAL9 yet until 2002. Ann Martin has since retired and Jonathan Elias had stints at KNXV, WBZ and is currently at WJLA-TV.
For the KCNC and WTVJ Episodes I know the staffs have changed since the episodes were filmed and released.