Easy but fun. Might be worth considering widening the solution choice to include Doctor Who.

Nice and easy

Wasn’t sure how hard to score difficulty for it - not everyone will find the names category easy
I didn’t spot it when solving the grid - only when I’d selected the rest and it fell into place - and I’m a fan!

But for me it it was very easy so I went with that :)

Easy but pleasantly put together. Doctor Who foxed me but I was never a great fan. Might be an idea to spice things up with a couple of red herrings.

as already said, very easy to get all groups, the Dr Who link was the only tricky bit. Please ensure you include singular and non-capitalised terms in your answers.Neither colour nor element was accepted,

Easy but enjoyable