Fox has officially announced their Fall line-up and fan favorite Bones will remain in it's Thursday spot from 9-10. However, a slight change will be made mid-season due to Emily Deschanel's pregnancy. Bones spin-off, The Finder, will premiere mid-season as a contingency plan for episodes missed by the starlet. Fox President Keith Reilly gives us the details about the decision to split the time slot.
By adding The Finder, we did this planted spinoff that we got some great feedback on. Bones has one of the most loyal fan bases on our network. That's something we want to seed and service. Everybody would like to have a show like Bones, and we said instead of starting from scratch, let's build one out of Bones. We're serving different parts of the audience at Fox but we have to service our core as well.
Source: TV Guide