It looks like it wasn't just a case of Finn Polmar turning down Alicia Florrick's offer to become her partner in the season finale of 'The a Good Wife'. Matthew Goode, who played Finn, won't be returning to the show as something of a regular, but it's pozz'ble , just pozz'ble, that he could still make occasional guest appearances.
It's a good thing they never took the next step in their relationship and became lovers. It would have been much harder to extricate Finn from the storyline.
I would not be surprised to see Goode return to 'Downton Abbey', where he introduced a potential suitor for Lady Mary in the last Christmas special.