A look back at memorable moments from Season 4.
Jenelle finds out she's pregnant in the Season 5 premiere. Later, Leah struggles with Ali's medical diagnosis.
Jenelle meets a new guy; Chelsea starts beauty school; and Leah goes on vacation.
Ali will need to use a wheelchair; Jo and Kailyn fight about Isaac's drop-off; Jenelle and Nathan decide to cohabit.
Jenelle moves in with Nathan; Chelsea invites Adam to pick up Aubree from pre-school; Kailyn and Javi put in an offer on a house.
Kailyn prepares for her wedding; Jenelle and Nathan decide to have a baby; and Chelsea celebrates her 22nd birthday.
With Aubree's 4th birthday approaching, Chelsea throws a party for her daughter. Jeremy passes out at work so returns home and it's court day for Kailyn and Jo.
Adam angers Chelsea with a visitation request; Jenelle has an unexpected surgery.
Kailyn breaks down when she realizes her mom won't be at her wedding; Chelsea takes Aubree to her first dance class.
Kailyn and Javi celebrate their wedding; Chelsea graduates from esthetician school; Jenelle accepts a plea; Jeremy turns down a local job.
Ali tests out her wheelchair; Leah struggles with Jeremy's absence; and Jenelle and Nathan receive exciting news.
Kailyn's baby is born; Leah and Jeremy work on their relationship; and Nathan is arrested.
Javi makes his return to work, so Kailyn finds herself left with the children. Things get worse between Nathan and Jenelle. Jo finds herself a new place to live. Chelsea hears what's going on with Adam. Leah finally finds out what's wrong with Ali.
Dr. Drew hosts a check-up with the cast to see how or if things have changed since the season finished filming.
Unseen footage from the past season.
Dr. Drew continues his check-in with the girls as he finds out if anything has changed since the cameras stopped filming.