Board Thread:General Discussion/@comment-25582606-20150211145702/@comment-24674051-20150218142233

I'm going to admit that I don't keep track of which episode they are currently filming, but I did have a thought.

The announcement said she would be in a 3 episode arc. If it were to happen to start with 4x20, then she would be in the season finale, and depending on the contract, it could be the beginnings of a setup for next season. (3 episodes for season 4, with an option to continue to season 5, something like that).