x files episode?

Question

looking for a particular episode
probably season 6th or 7th seventh
it is about a snake like transparent creatue
the casting of the series starts with image of this creature on the screen with x files music

Answer 1

There are a few actually. One being 'Signs and Wonders' where a man believes he can control snakes. Another would be 'Hungry' where a man eats the brains of humans. The last I can think of would be 'Brand X' where a snake like bug is living inside humans who use a particular brand of cigarette. For many more episode titles and scripts go to
http://www.redwolf.com.au/xfiles

Hope This Helps!