Over the years the show ran, many changes were made:
- For the pilot & first seasons, Walker drove a GMC Sierra. Trivette drove a red Pontiac Firebird, while Alex drove a Pontiac Sunbird Convertible.
- For season two, all the GM vehicles were replaced by the closest equivalent Chrysler counterparts. Walker drove a Dodge Ram, which was outfitted with “Hide-A-Way” strobe lights in its headlights and tail lights. Trivette drove a silver Dodge Stealth, while Alex drove a Chrysler LeBaron convertible then a Chrysler Sebring. In later episodes, Trivette drove a black Ford Mustang GT.
- In early episodes, Walker’s weapon was a .357 Colt Python. In later episodes, it was a .45 ACP Colt M1911 or a Beretta 92 FS Inox. He switched to a Taurus PT92 for the show’s final seasons.
- While the pilot season did not have an opening theme, the first season had an instrumental opening theme which was changed for season two. Partway through the second season (with the episode “The Big Bingo Bamboozle”), it was replaced with the song “Eyes of a Ranger,” performed by Chuck Norris, which would remain in the opening credits for the remainder of the series.
- The early episodes featured some Cherokee mysticism. But since Norris, according to his own account, “recommitted his life as a Christian in the mid-’90s”, the later episodes starting with season 4 featured an increased use of Christian symbolism and family issues, e.g. close friendships with Christian ministers. The episodes sometimes focused on children with Walker assisting them through a crisis. This also included Alex opening up the H.O.P.E (Help Our People Excel) Center during the sixth season, which lasted for the remainder of the show.
- For the last two seasons, two young characters, Rangers Sydney Cook (played by Nia Peeples) and Francis Gage (played by Judson Mills), were added to the cast.
- Mid-seventh season, Noble Willingham left the show to pursue a career in the United States Congress, making his final appearance in the episode “A Matter of Faith”. As a result, episodes after his removal from the opening credits included only references to his character C.D., who would never appear again, even when the character died as a way of writing him off.
- In the season seven finale (”Wedding Bells”), Cordell Walker weds Alex Cahill (who became Alex Cahill-Walker from that point on).
- In the last episode of the series (”The Final Show/Down”), Cordell Walker and Alex Cahill-Walker have a daughter named Angela. (This is also the name of the baby girl born to Chuck Norris’s character in the movie Hero and the Terror).
- In the pilot season and first few episodes of Season 1, Trivette wore glasses. Later, he stopped wearing them.
- In the first few seasons, Trivette’s computer was a laptop; after that, he had a desktop.
