[James2001]

Series 8 wouldn't have been as bad if they had changed the kids, but at least kept Brian & Sophie's memories. It was that which basically made the final series so poor, they undid everything from the previous 7 series and they even felt like entirely different characters, not to mention the holographic man suddenly appearing in the guidebook who'd never been mentioned before. The final episode of series 7 was very well done, and would have been a perfect place to leave it. It was basically a reboot, if you cut off those first couple of minutes of the first episode where their memories get wiped, there was literally nothing to connect it to the previous 7 series, they may as well just have crash landed on Earth for the first time.

The CITV channel stopped repeating series 8 quite quickly, which shows they didn't think much of it either.

I don't know if anyone remembers My Spy Family which was made for Boomerang, by Kindle Entertainment who were basically the former ITV childrens department after it was closed, it was pretty much just MPAA but with spies instead of aliens (made by most of the same production team), incredibly derivative.