Just saw the last episode of Bones S5 which ends with Hodgins (Bones' bug guy) and Angela married and travelling to Paris for a year. And saw somewhere (and have just confirmed on Wikipedia) that Gil Grissom is a lecturer at the Sorbonne as of CSI S10.
Someone REALLY needs to write a story in which Hodgins and Grissom meet up in Paris and bond over bugs... I haven't seen the relevant CSI episodes and don't know Paris so it won't be me.
Optionally throw in Highlander's Amanda and/or Methos, both of whom have lived in Paris intermittently, for a nice complicated forensics mystery involving decapitated bodies etc.