"[CBS Entertainment Chairman Nina] Tassler noted that they have yet to decide on an episode count for what will be the show's fifth season, or if it will in fact be the show's swan song season."
-- The Hollywood Reporter
"Tassler said there had been no decision yet on how many episodes would be ordered for midyear shows, and whether this meant the last season for Person of Interest."
-- NY Daily News
"As for how many episodes Person of Interest: Season 5 will [have], like the other midseason shows on CBS, Tassler said that decision was also still being made."
-- IGN
"CBS is holding Person of Interest until midseason, but did not confirm a 13-episode order. This is what CBS chief Nina Tassler had to say: 'We're having those conversations with the team right now. Jonathan Nolan and Greg Plageman came in and pitched really terrific ideas for the new season. And you know, we have to see. It's always been a very smart, creative show. We don't know yet whether or not it's going to be the end or not. If it is, we'll have a great ending.'"
-- TV.com