tricksiest

Spearhead is the tricksiest; it doesn't have the Master, and I don't recall it having some of the wilder action sequences that came to be the hallmark of the Pertwee series, but it is a nice tie-in to the new Doctor Who because of its villain, and it's a good, speedy episode.

Doctor Who Eats Cat Meat With A Chainsaw 2006

I actually tried it today, with my tricksiest group.

Kinaesthetic Kid « We Don't Count Your Own Visits To Your Blog 2006