Whether the object is to snag the most eligible bachelor or win a million-dollar prize, many of today's reality shows are built on greed. Considering the lengths that people will go to win, should Christian contestants subject themselves to such temptations? What happens when a Christian is isolated from society for over a month, interacting with unbelievers and those whose only mindset is "win at any cost"? Does the experience shake your faith or enhance it?

TC found four contestants who saw their involvement on a reality TV show as a chance to spread the gospel, and although some of their efforts may have ended up on the cutting room floor, they feel that God called them to the experience.

After the Nakum tribe hiked 11 miles through dense jungle and sat down to eat a meal of corn, Danni Boatwright asked, "Do you mind if we say a prayer over it?" They agreed—and during the next 39 days there were other opportunities for prayers, especially when her team would win a contest. Soon the producers of Survivor: Guatemala had dubbed the tribe the "God Squad."

"It was really stepping out because everyone wasn't a believer. I thought, 'This will work out, or I'll be voted off right away,'" she recalls. In the end Danni, a former Miss Kansas and an international model, maneuvered her way around her bickering comrades, earned their respect and their votes, and won a million dollars.

According to Danni, "The hardest thing for a Christian on reality TV is not to compromise your standards. You have to trust in the Lord—which I did, and He would open doors for me. He took me down a path where I didn't have to lie and cheat," she says. "You just have to watch for those openings so you don't miss them."

During her castaway experience, Danni had opportunities to witness to several of the contestants. One of her most rewarding memories is when Margaret Bobonich started asking questions about salvation and later promised to find a church.

"I was never in my life so in tune with the Lord as I was out there. There was lots of quiet time, and I prayed a lot," Danni says. "There were times during the contests when I needed something more than physical or even mental ability. I needed to draw on something spiritual."

In the final immunity challenge, Danni, who has scoliosis (curvature of the spine), was secretly in agony as she braced her back against a pole while standing on a wobbly board for hours. "I kept picking my nails like it was nothing, trying to psych out the others, but I was really hurting and praying for God's help," she remembers. "I endured only through the grace of God."

Danni insists that her win doesn't mean she's favored by God over anyone else. "I have no idea why He let me win; I just know He did," she reflects. "The first thing I did was to pay my tithe. I'll do my best to always show my gratitude for this gift and the opportunities Survivor's door opened for me."

Danni is now a sideline reporter for Arena Football in Kansas City and hopes to do the same at NFL games this fall.

Ryan Kelley weighed 225 pounds when she decided to undergo a radical physical makeover through diet and exercise. As a contestant on the Biggest Loser 2, she admitted that food had become a coping mechanism after two heartbreaking miscarriages. Her weight continued to climb after hearing that she couldn't have children. Soon after adopting a child from Guatemala, Ryan became pregnant and was able to carry the baby full term in spite of her weight. She was extremely happy, but she didn't know how to stop binging when she was overly emotional.

After trying for years to slim down without success, she decided that maybe if she had a camera in her face, she could lose the weight. Although she did lose 30 pounds before being sent home after a month, Ryan says it was a constant struggle to be Christ-like in a house full of hungry, grumpy people (herself included) who were exercising six hours a day.