Poor series 8. As one of it's few fans here, I wonder if it's a "British" thing to hate on it. All my friends who like RD in "real life" (all fellow Americans, obviously) like it just as much as the others. In fact, I remember when it came out, many people I knew said it was a return to form after the less-funny S7 (I'm a huge S7 fan, though). From watching the DVD documentaries on all the series, it looks like everyone involved had a great time making S8 as well. Long story short, I'm not totally shocked that Doug would let some of the better stuff from S8 influence S10. After all, it was the last complete series, since S9/BTE was basically just a miniseries.