The first is a crossover of "Doctor Who" (10th Doctor) and the 2005 BBC miniseries "Casanova." I learned the hard way that
David Tennant, who plays the 10th doctor, was the star of "Casanova" as well. Explains a lot while reading the fic. :) That said, proceed to
"Neither One nor the Other" by
xwingace.
The other rec is for the
Rimmer-centered "Red Dwarf" fics that
rangergirl is writing for
fanfic100. One hundred fics for our favorite smeghead. Yow!