Originally published on NYTimes.com.

8 P.M. (ABC) EXTREME WEIGHT LOSS?In this Season 4 opener, Chris and Heidi Powell, trainers and coaches specializing in the ?superobese? ? people who exceed their ideal weight by approximately 225 percent or more than 200 pounds ? help Charita (310 pounds) and Ty (480 pounds) get fit. Ty, who plays baseball, works out with Josh Hamilton of the Los Angeles Angels of Anaheim; Charita begins a new career as a Zumba instructor and schmoozes with the R&B group TGT and the chef Rocco DiSpirito.