If you have two equal favourite characters, that's fine to vote for
both. I will give half a point to each.
Carie, unfortunately only the first two series have ever been
released on video – and these have one episode missing from each
series as well as numerous cuts.
I imagine it's unlikely the BBC will release more episodes but it
can't hurt to contact the BBC shop and ask. Hopefully UK Gold/UK
Drama will repeat all the episodes at some point – again, an e-mail
to the company can't hurt (though they're probably fed up with me
bombarding them with requests!)
Otherwise your only hope is if someone taped the episodes off UK
Gold/other source and can copy them for you.