The 100 Boss Explains Bellamy's Absence, a New Threat, and that Sheidheda Twist

tvguide.com:

[Warning: This post contains spoilers about the Season 7 premiere of The 100, "From the Ashes."Read on at your own risk!] The 100 Season 7 has finally arrived, and as expected, we were left with more questions than answers!

Do we really have invisible people to contend with on top of bodysnatchers and Anomalies now? While Clarke was busy keeping things in check with the Children of Gabriel, the Eligius prisoners, and the people of Sanctum, crazy things were afoot in the woods with Bellamy's (Bob Morley) group.

The Season 7 premiere didn't quite answer what became of Octavia (Marie Avgeropoulos) after the Anomaly receded, but we did get some huge clues about who the gang will be facing off with this year.