Tom and TerraCycle are close to finalizing a deal for a coffee table book of DIY upcycling ideas but the team first needs to create a sample chapter. In preparation for a meeting with the publisher, Albe asks Dean to work on being more professional.
In an effort to expand their Zero Waste recycling program to small businesses, Rhandi and Dan work on developing a successful sales pitch strategy. While accompanying them on their pitches, Stephen stumbles upon a potential new waste stream.
Tom is eager to start a paint-recycling program. Rick and Ernie work on the recycling science, while Dan sets up a pilot program with a local hardware store. Tom enlists Dean to facilitate a staff graffiti contest at the 10th annual Graffiti Jam.
After previous failed efforts to recycle gum, Tom tasks Andrew with developing a new plan. The Science and Graphics teams do everything they can to make it work. Meanwhile, in the lead up to his birthday, Dan asks Dennis for help getting in shape.
Tom meets with corporate partner Garnier about refreshing their co-sponsored communal garden in Harlem. Tiffany asks Stephen for help on creating an upcycled bench for the garden. Meanwhile, Tom tries to eliminate meat from the office lunch program.
When Tom and Stephen each sell the same million pounds of recycled plastic, the team scrambles to find the additional materials needed to fill the extra order. Andrew, Dean and Karina are fed up with the office's hippie atmosphere and hatch a plan.
Grace, Dennis, and Tom travel to Toronto to help the Canada team launch a national air-care brigade with Febreze. Back in Trenton, Rick, Dean, Dara, Dan and other TerraCycle staff, gather together to help Stephen jumpstart to his love life.
When TerraCycle's corporate partner, The Naked Grape, wants to highlight their partnership by selling upcycled and recycled wine-related products, Tiff and Stephen get to work. Al, along with Albe's support, revisits his old hobby, stand-up comedy.
TerraCycle is expanding into a new building, and Tiff and her team, constricted by a tight deadline and an even tighter budget, must "trashify" the new space. As news of the move spreads, Dan and Dean are determined to get a spot in the new office.
In the center of the office, Tom and the executive team invite Tony to a meeting. In the meeting it is revealed that the executive team is looking to sell a portion of TerraCycle to help the company grow. Tony is tasked with creating the perfect deck to present to investors. In an added bombshell, Tom tells Tony to keep this information under wraps. Meanwhile, Dean meets with Tom to discuss Dara's upcoming ten-year anniversary with the company. Because Dara is the first TerraCycle employee to reach this milestone, Dean suggests celebrating it with a surprise party.
Tom assigns Steph the task of launching TerraCycle's Public Locations Pilot Program in the United States, replicating the success they had with it in the United Kingdom. Steph must recruit and motivate a volunteer to hit certain benchmarks and quick. It's not an easy job, but the goal is to prove this program's viability to their partner, Malt-O-Meal, on a small scale before they commit to a nationwide roll out. Meanwhile, Rhandi has hired a new salesperson to the team, Rich, and Dan immediately sizes him up. Dan and Rhandi learn that Rich is an old-school salesman.
Gina arrives for her first day at Terracycle as the newest addition to the account management team. Andrew advises her on the office culture including Five Minute Fit, a daily office-wide exercise regimen, and the vegan menus. Tiff & Darshan meet with 3D Brooklyn co-founder, Nate, to learn more about 3D printing technologies that could help increase efficiency while using recycled plastics. Eager to meet her coworkers, Gina arrives to her first Five Minute Fit. Sara learns that Gina is a yoga instructor and invites her to teach a future session.
The newest R&D employee, Raj, adjusts to working in front of a camera with Stephen's help. Ernie, Rick and Raj meet with Tom and receive their latest assignment, finding a recycling solution for TerraCycle's most unique waste stream yet --condoms. Rick is less than thrilled. Dan catches Tom and Rhandi by surprise when he meets with them to give his two weeks notice. The R&D team meets with German condom company, Einhorn to discuss a recycling solution for their company's pre-consumer condoms.
The Zero Waste team lands a major deal with Loctite, the world's largest adhesive brand. Tom stresses the importance of this deal; finding a solution to recycling industrial adhesives will open the doors to other potential clients. R&D must tackle this complicated science by finding a way to recycle Loctite bottles and the residual adhesive that remains in the bottles. After eavesdropping on Andrew and Dean's conversation, Gina tries to grill Andrew for details about his girlfriend, Alicia, but Andrew maintains his right to privacy.
Design teams up with R&D to create a gamified recycling bin as part of an interactive recycling initiative for Pepsi. Tiff and Darshan meet with Rick to plan how to scientifically measure changes in recycling rates. The Design team and interns brainstorm what encourages people to recycle and create ideas for three prototypes: a visual response steampunk design bin, a gamified bin with a launcher element, and a compliment bin which pays you a compliment for recycling.
Tom and Tony meet with David Greenberg at L'Oreal to discuss ways of expanding their partnership in collecting and recycling cosmetic waste. Business development with Japan has stalled, and Tom stresses the importance of creating a successful case study with L'Oreal Japan to expand business throughout Asia. Tom tells Tony and Rick to pack their bags for a last minute trip to Japan.
In the series finale, Stephen meets with Tom to discuss ways to improve sales for the energy bar recycling program as part of his five-year self-improvement plan, S.T.E.M. -- Stephen Total Evolution Makeover. With Gina as the Larabar brand manager, Tom suggests Gina and Stephen partner together to boost Larabar collection numbers.