See Also: 'Secrets & Flies' Episode Guide

CBS last week released the promo video of the new CSI episode "Secrets & Flies."

In this episode, the CSI team uncovers evidence in the investigation of a young mother's suicide that proves that the woman's newborn baby was not her biological child -- in fact, she was still technically a virgin at the time of her death. If the team discovers how the child was conceived, the answer may lead them to a killer. Meanwhile, Grissom is called into court to refute expert witness testimony from a suspected manipulator of evidence. "Secrets & Flies" was written by veteran Josh Berman.

The trailer is currently available for download at CBS.com. For those of you with slower connections, here's a full transcript with screen caps of the trailer.

THE ONLY THING MORE MYSTERIOUS ABOUT WHO MURDERED THIS MOTHER

[A woman is crying, begging someone for her life.]

Woman: "Please don't do this."

[A little baby gets up from his playpen and looks out.]

[As he looks out, we see his mother on the floor, dead.]

[Text-over: 'TV's Most Watched Drama.']

[Catherine, Grissom, and Warrick are at the scene, gathering evidence and photo-documenting it.]

[Text-over: 'Who Murdered.']

[We see the woman on the floor, with a puddle of blood around here.]

[Text-over: 'This Mother?']

[Nick and Doc Robbins stand over her body at the morgue.]

Doc: "Gun shot wound killed our virgin Mary."

[A few neighbors stand and watch as the body is wheeled out of the house.]

[Nick addresses Doc Robbins.]

Nick: "How do you explain this miraculous conception?"

[The baby is still in the crib, looking out and crying for his mother.]

IS HOW SHE GAVE LIFE

[At the lab, Catherine examines evidence in the layout room.]

[Text-over: 'How she gave life.']

[Grissom examines a wall using his flashlight.]

[A man addresses Catherine.]

Man: "God got her pregnant."

[Catherine looks incredulous.]

[Sara attempts to explain this weird case.]

Sara: "Sometimes fact is stranger than fiction."

[Grissom looks up, looking as incredulous as Catherine.]

A NEW CSI. CBS – THURSDAY

[A black screen.]

[Text-over: 'CSI: Crime Scene Investigation. TV's most watched drama. New episode – Thursday 9/8c.']

To view the trailer of this new CSI episode, head over to the official CSI website.

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