Catch up with original girls who started it all and relive Catelynn, Maci, and Amber's journeys as they navigate being 16 and pregnant to the Teen Mom's they are today.
Cate and Tyler find out they are pregnant so Cate wants to get married in a courthouse. Maci struggles co-parenting with Ryan. Amber falls for Gary's flirting, but then is crushed when he goes on a family vacation with his new girlfriend and Leah.
Catelynn and Tyler plan a party to go public with their baby's gender. Maci has a hard time believing Bentley is starting kindergarten. Gary asks Amber to help out with Leah's first day of kindergarten.
Tyler posts a video of Carly on their fan page which upsets Brandon and Teresa. Maci continues struggling to communicate with Ryan about co-parenting. Amber is extremely hurt by Gary because he won't let Leah spend the night.
Catelynn learns that Brandon and Teresa want to discuss adoption issues. Maci reveals that she and Taylor are expecting a baby. Amber discovers that Gary and Kristina are also expecting a baby of their own.
Cate and Tyler meet with Brandon and Teresa. Maci tells Ryan and his family she's having a baby with Taylor. Amber confronts Gary about his flirting. Farrah is hurt after not bring a part of the season from the beginning.
Cate finds out she has gestational diabetes. Farrah struggles with her mom's visit. Amber reveals her relationship with her boyfriend and Maci quits the show when she finds out Farrah is back.
Maci returns to the series, but has conditions regarding Bentley. Catelynn and Tyler struggle with being first time parents and they get a special gift from Teresa. Farrah introduces her boyfriend Simon to her mother. Matt proposes to Amber.
Amber, Farrah, Maci and Cate come together in New York to do press for the show. The tension between Farrah and the rest of the girls comes to a head when Farrah discovers that Maci had quit the series because of her.
Tyler puts pressure on Cate to lose her pregnancy weight. Things boil over between Amber and Matt in Vegas. Maci worries about Bentley's safety while in Ryan's care and Debra attempts to go into business with Farrah.
Amber's family questions Matt's intentions when his past is revealed. Catelynn leaves Nova under April's care. Maci and Taylor find their dream home. Simon meets Sophia and Farrah pressures him for an engagement.
Dr. Drew sits down with the cast of Teen Mom OG in front of a studio audience, and chats with Maci about her decision to pull Bentley off the show. Amber and Matt discuss their age difference.
In part two, Catelynn has an adorable surprise for Teresa, and Farrah discusses all of the drama that surrounded her return to the show.The four moms finally get serious and unpack the conflict between them.
Dr. Drew sits down with the cast of Teen Mom OG in front of a studio audience, and chats with Maci about her decision to pull Bentley off the show. Amber and Matt discuss their age difference.
For the first time ever, Maci, Farrah, Cate and Amber show us what it's like to shoot Teen Mom. They share personal home videos and we see just how close they are with their crew. Nothing is left on the cutting room floor.