This discussion may contain spoilers!
This is more of a prediction about an unseen character(s) from season 1 and 400 days.
In Episode 1 Carley talks about Steve who is a radio broadcaster for WABE who was heard on the radio in Season 1 after fixing it. His whereabouts after the apocalypse are unknown, though it is possible that the radio station was overrun and he was killed as heard during his final broadcast when signing off.
Steve is also a character mentioned by Russell in the "400 Days" DLC. He was a leader of a group of seven people, including Russell, a teacher and his wife, a father and daughter as well as one unspecified survivor who used to be a cop.
"Steve was a bad dude, but everyone was with him, you know? He said seven was the magic number, so we didn't add nobody to the group. If we found survivors it was the same every time. He... he... Just... "We gonna kill these folks and take their stuff or what?" and then bang, they'd be dead."
—Russell explaining how Steve was to Nate.
So I have seen a few possible theories possible about Steve.
1) One is that he is the same person mentioned from season 1 and 400 days. You guys think this may be possible? If it is how likely is it that he may appear in Season 2 or even a Steve will be mentioned as a little easter-egg?
2) Second is that Steve may be the voice on the other end of Tavia's radio. Possible? he would potentially know how to work long range transmission equipment.
3) Third it is just total coincidence and Steve has nothing to do with anything
4) it has also been suggested based on the first theory that Steve may be the guy in the picture opposite Clem possibly interrogating her. http://www.telltalegames.com/walkingdead/season2-screenshots/ (to have a look)