'Survivor: Philippines' Preview: Ailing Castaway Faces Game-Changing Decision (Video)

Jeff Probst
Monty Brinton/CBS

After four straight nominations (three of them wins) in the outstanding reality host category, Survivor's Jeff Probst will have to settle for watching on the sidelines. Betty White managed to sneak her way in for her candid camera series Betty White's Off Their Rockers, replacing Probst.

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Warning: Spoiler alert!

At the end of last week's Survivor: Philippines, a teaser revealed that one castaway might be forced to evacuate the game in the upcoming episode due to medical reasons.

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A new preview clip from CBS reveals who that castaway is.

Dana Lambert from the Kalabaw tribe is the person whom host Jeff Probst visits at camp after she starts running a fever and having severe pain in her abdomen.

When Probst asks about her level of pain, Lambert replies, "like a knife."

Medical personnel are called in, and they say the decision to stay in the game is ultimately up to her.

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Incidentally, this season featured three returning survivors -- Mike Skupin, Jonathan Penner and Russell Swan -- who were all medically evacuated from previous seasons. Swan was voted out in last week's episode.

Survivor: Philippines airs at 8 p.m. Wednesdays. Watch the preview below.