We learn that many BL alumni got together this year to run the Detroit half-marathon. Pete, who we already caught up with, and season seven winner Helen, teamed up to put on a dinner for everyone. Helen looks pretty fab. Mike and Ron show up, and Helen says it's nice to have the support of their fellow Biggest Losers around, especially when you're running a marathon. Season six's Stacey is there, and she tells us that she started at 221 pounds and now weighs 156. Season seven's Carla shows up, weighing a slimmed-down 247 pounds and looking fierce. She was once the heaviest woman on the show at 379 pounds. Then there's Michelle's mom Renee, also looking lovely. Renee started at 267 and she currently weighs 175. And hey! It's Shellay and Amy from season six! We don't learn their weights, but they look great. And then there's season six Coleen, who also doesn't tell us her weight but looks lovely as ever. A lot of folks we've already caught up with are there, too. The chef greets the alumni and tells them they'll have a low-calorie dinner. Everyone seems very happy to catch up. And then Jillian shows up in her puffy coat! Helen's glad that she didn't catch them noshing on tiramisu. Pete picks Jillian up and spins her around. He says that he loves Jillian to death, and that it was her guidance that enabled him to keep the weight off. Jillian toasts to all the crazy people running the marathon. She says that the alumni network that they've created enables them not only to support each other, but inspire a lot of people out there. She couldn't be more proud to call them her partners in crime.

The Losers hit the starting line for the half-marathon, and Pete is stoked. They are a rowdy bunch, for sure. They're all so happy when they finish, and there's lots of joy and hugging. Coleen says this is the furthest she's run in her life. She looks like she's maybe put a few pounds back on, but she's run 13.1 miles, which is more than I can say. This is Carla's first race, and she feels like a million bucks. Good times!