2000s UNIT

This particular series was released in 2004, meaning it predates the new series, and was produced well before the “Brave New World” series, although it takes place later. It takes place in the year it was released, but mostly seeks to update the Classic-series version of UNIT into the 21st century. As such, it features Nicholas Courtney as Brigadier Alistair Gordon Lethbridge-Stewart, but only in some of the stories, sadly. Although it’s not stated, I imagine this series got curtailed when the new series premiered, with a new version of UNIT appearing almost immediately on TV.