Charlie's Angels: Season Four was the fourth season to Charlie's Angels. The season starred Jaclyn Smith, Cheryl Ladd, David Doyle, and introduced Shelley Hack as Tiffany Welles, the newest member of the team, as a police graduate from Boston. Original Angel Farrah Fawcett also appears in three episodes. Season Four originally aired from September 12, 1979 to May 7, 1980.

It was during this season that ratings had fallen, but still remained in the top 20; some believing Shelley Hack was to blame, others are of the opinion that the change in format from team oriented episodes to episodes that focused on one angel caused the rating decline. This season also has the only episode of the entire series with no Charlie. Shelley Hack as Tiffany Welles became the favorite angel of all, for be the most professional and classy than the other, who started to act a little to unprofessional after Sabrina Duncan departure.

Charlie's Angels: Season Four was het vierde seizoen van Charlie's Angels. In dit seizoen spelen Jaclyn Smith, Cheryl Ladd en David Doyle de hoofdrollen en wordt Shelley Hack geïntroduceerd als Tiffany Welles, het nieuwste lid van het team, als afgestudeerde politieagente uit Boston. Originele Angel Farrah Fawcett verschijnt ook in drie afleveringen. Seizoen vier werd oorspronkelijk uitgezonden van 12 september 1979 tot 7 mei 1980.

Kate Jackson (Sabrina) quitte la série, remplacée par Tiffany Welles (Shelley Hack), agent du FBI reconvertie. Cette nouvelle dynamique apporte une approche plus intellectuelle aux enquêtes. Kelly et Kris accueillent leur nouvelle partenaire while maintaining leur efficacité légendaire dans des missions toujours plus complexes et périlleuses.

26 épisodes | Saison produite en 1979-1980 | 1ère diffusion : septembre 1979 sur ABC (U.S.A.)