With Arnold Schwarzenegger as the new boss, the celebrities get right down to business with tasks from Tyra Beauty and Trident gum.

Season 12 of Donald Trump's business-savvy series opens with 18 celebrity players creating and selling deli sandwiches. The star contestants include Arsenio Hall, Clay Aiken, Cheryl Tiegs, Debbie Gibson, Adam Carolla, Lisa Lampanelli and Penn Jillette.

Season 13 opens with 14 returning celebrities tasked to sell meatballs in a charity competition, but there are beefs due to a power struggle and an unorthodox approach to the mission. Stars include Trace Adkins, Stephen Baldwin and Gary Busey.

The contestants are split into two teams, one team of 8 men and another team of 8 women. The two teams are then given their first challenge - sell lemonade on the streets of New York with a budget of $250. The team that makes the most profit wins.

The two teams are each given a "Jet Stream" trailer to transform into a mobile campaign to promote and sell Kodak products. The pressure builds when Hydra damages their computer and Empresario misses out on a meeting with the executives.

The remaining celebrity contestants must create awareness for a footwear company's shoe-donation campaign. One celeb steps up the drama by defecting to the other team. But is that defector actually serving as a spy? Ivanka Trump and Donald Trump Jr. are the project overseers.

The teams produce and perform a medieval-theme show for an audience, yet an insubordinate contestant and a serious injury mar the task.

The teams jet to Universal Orlando Resort in Florida to produce an interactive 3-D photo experience, but an indecisive project manager and a tyrannical leader mar the mission.

The all-star celebrities must perform a soap-opera scene for a beverage-mix product. One team doesn't mix well, however, when a project manager tangles with an insubordinate member.

The celebrities are tasked with creating original, three-dimensional artwork. But winning the task comes down to fundraising, and one contestant struggles with bringing in enough money to keep the team safe in the Boardroom. Meanwhile, the other team's Project Manager has to deal with a teammate who over-promises and under-delivers.

When tasked with creating an interactive travel expo for South Africa Tourism, the All-Stars find a former competitor now on the other side of the boardroom table. Down in numbers, one team tries to get the task done with a lame teammate, while the other team's project manager drops the reigns and their concept gets out of control.

Donald Trump returns for an eighth season in the boardroom. Joining him are fourteen new celebrity candidates vying for the title of the Celebrity Apprentice, as well as $250,000 for the charity of their choice. First up, a bake sale featuring cupcakes in a challenge to sell the most, despite culinary challenges and a surprise taste test.

Donald Trump divides the celebrities into men versus women and instructs them to choose a team name and in a surprise twist, Trump asks them to choose the opposing team's project manager. For their first task they must run a New York City diner. The team who brings in the most money at the diner, including tips, wins. It isn’t long before the celebrities’ egos clash as they compete to see who will be the first celebrity to face Mr. Trump in the boardroom and hear the words "You’re fired."

The celebrities must use a glass truck to promote a hair-care and spa-products company in a mission that challenges marketing skills. One team lacks harmony thanks to a troublemaker while another star is labeled a weak player.

The All-Stars must once again work to promote popular Australian Gold products, this time by creating a silent film. One project manager is cast aside when a power-usurping teammate takes over the task. Meanwhile, the other project manager risks everything by going against the advice of a teammate.

The series returns with 16 new stars! Watch these celebrities battle in men vs. women teams, tackling business challenges that test their skills and creativity. First up: a pie selling challenge where it is winner-take-all. Who will be sent home?

Teams tackle their next challenge: creating commercials for Neat's digital organization tech. Kevin Jonas leads the men confidently while the women's team struggles under Kate Gosselin's uncertain leadership. Who will win, who will fall?

The teams create product-tasting presentations for Luvo, a healthy frozen meal company. They will be judged on brand messaging and overall presentation, and will serve a menu of Luvo products to diners. Vivica and Terrell step up to lead the teams!

In this fiery episode, the celebrity teams create a fitness advertorial for Cosmo Body Magazine. Two members of the men's team solidify their seething rivalry, while the women fight over who should be the fitness model for their photo shoot.

The celebrity teams battle to create the perfect display for Ivanka Trump's shoes! Kenya Moore and Vivica A. Fox lead their teams in this stylish marketing challenge, with Joan Rivers helping judge. Who'll step up and who'll get stepped on?

The teams challenge this week involves a new cell phone in which they must create an event for. But dramas unfold, including a fiery exchange which may become physical. Also, one celebrity is a no show, and another star storms off claiming the celebrities are not being used in the correct situations.

The celebrity players are assigned to write and produce a viral video promoting a mop. It's risqué business when one team hatches a lusty concept. Meanwhile, serious divisions mar the other team.

The celebrities must host a launch party for a "mocktail" drink product. One team sets sail with a beach theme while the other produces an exotic Garden of Eden experience.

Fallout from a previous boardroom session results in one celebrity launching an emotional tirade and another one going missing. As for the challenge, the players must write, direct and produce a 60-second commercial for an entertainment Web site.

The remaining celebrities create original puppets for Henson's "Stuffed and Unstrung."