cassie is released from a clinic, where she received treatment for her eating disorder. in the first episode, called "tony", she stays with sid and offers to have sex so he can lose his virginity, but she passes out before anything happens. in the second episode "cassie", it is shown that she is not better and is still sick. she has also developed a crush on sid. in "sid", the fifth episode of the season, cassie tries to kill herself after sid cancels a date they planned, so that he could be with michelle richardson. in "michelle", michelle takes sid to see cassie, but cassie is dating someone called simon, a patient in the hospital she is currently in. in the last episode of the season, cassie says she is moving to scotland with her family, away from bristol. cassie writes sid a letter and leaves it at his house after sneaking out the hospital. she is also given a letter sid wrote to her from tony stonem. in the last moment of the season, sid finds cassie and they sit together and hold hands.