Board Thread:Character Discussion/@comment-97.93.25.130-20141113053725/@comment-27794543-20170322014025

Octavia spent about a year in prison. That class, shown in s3 flashbacks, was started two weeks before the 100 were sent to the ground with only prisoners who were to be sent to Earth attending. Thus, Octavia was already in prison and could attend the prison class. I guess you "forgot" a few details.