Irene Alvarado

Host Alison Sweeney tells the remaining 12 contestants that they will all be on one team this week -- the blue team -- and they will all have immunity if they beat their weight loss from the previous week. But first, there's a pop challenge in which they have to prepare delicious, healthy, low-calorie meals in under 30 minutes. Chefs Curtis Stone and Lorena Garcia will decide who prepares the best dish, with the winner getting a coveted prize. Later the blue team meets at a rock quarry where they'll have to uncover a buried rope attached to signs with trivia questions. If they answer the questions incorrectly, they will be led in the wrong direction, something all the players want to avoid since the winners get a huge advantage at this week's weigh-in. Later, Dr. Huizenga drops by with impressive medical updates, including the news that one contestant has already reached their goal weight. Then it's time for the weigh-in, when players found out if they all get to stay at the ranch another week -- or if they'll be sending one contestant home. Trainers Bob Harper, Jillian Michaels, Cara Castronuova and Brett Hoebel also star.

This week kicks off with host Alison Sweeney issuing a challenge to the ranch-based contestants: if they have a higher percentage of weight loss than the "unknowns" -- the contestants working out with the two new mystery trainers -- they'll all have immunity this week. The "unknowns" fuel the competitive spirit by delivering messages and surprises to the contestants at the ranch reminding them just how tough their competition really is. Then Dr. Huizenga gives sobering news to contestants about their health risks and their real ages vs. their chronological ages, but this time, loved ones from home are involved to really help drive the message home. Later, the ranch contestants' ability to work together as a team is tested when they try to beat the time of the unknowns in a wild bridge-building challenge using rafts. Then a tense weigh-in reveals whether the ranch contestants are safe from elimination, or whether they'll be sending another player home.

The contestants are faced with the "ultimate temptation" this week when each team enters a room filled with each player's favorite foods. Whoever eats the most calories gets to choose which team will go train with the "unknowns" and the new trainers. Later, the stakes are high with a calorie-counting challenge that will give the winners what they want most -- letters from loved ones back home. The trainers confront a contestant they think threw the last weigh-in, and later, trainer Jillian Michaels puts trainer Bob Harper through an intense yoga workout to show the players what they'll ultimately be able to do once they lose weight. Then one player takes matters into their own hands to try and send a contestant home. Alison Sweeney hosts the series.

This week, one eliminated contestant returns and the remaining players are split into four teams -- red, blue, green and black. Each team will be led by one of the four trainers -- Bob Harper, Jillian Michaels, Cara Catronuova and Brett Hoebel. While Bob takes his team to spin class and Jillian takes hers to work out at the beach, Brett leads his group on a hike and Cara heads to a boxing ring and has one of her players fight against a longtime boxer. Later, the four teams square off in a difficult challenge involving ropes and weights, and then gameplay at the weigh-in doesn't turn out the way one contestant expects, and another player is sent home. Alison Sweeney hosts the series.

The remaining four teams square off for a wild pop challenge that involves balancing eggs, and the losing team has to leave the ranch for the week and work with a limited budget to purchase what items they'll need most. Trainer Bob Harper takes his contestants to an inner-city school, where they energize the students with a fun workout and talk about the importance of fitness. Then all the contestants go on a huge Easter egg hunt for 5,000 eggs, including a Golden Egg that comes with a very coveted prize. And later, the players are treated to a sneak preview of the upcoming feature film "Hop." Finally, one player reaches a milestone at the weigh-in before another contestant is sent packing.