For now, season 5 remains exclusive for CBS, and it’s going to air in 2016. No other networks have been confirmed for this season, and this is likely how the situation will stay, as it wouldn’t make too much sense to introduce another network so late in the production process.
On the other hand, we definitely expect to start hearing talks about other networks once season 5 is underway, as the producers will have to start securing a deal soon if they haven’t already.
As we said above though, there are reports that there are already talks about bringing the show to another network behind the scenes, so those announcements might come out sooner than expected, and we could start hearing the producers talk about continuing the show very soon.
The question of which particular network could take the show on board also remains open. There are several possibilities and they seem likely enough, so it’s hard to make a guess right now. If a particular network starts showing more interest in the show however, we expect to hear that publicly quite soon. It would be in the interest of both the show’s producers as well as the network itself to announce that “Person of Interest” is coming there, and fans would be happy to hear that announcement just as well.