Sara Sidle and Gil Grissom are headed for a showdown in CSI: Las Vegas' series finale.

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Grissom (William Petersen) will return to Las Vegas for one final case, and his presence will undoubtedly stir up feelings for his ex-wife Sara (Jorja Fox). To complicate matters even further, Girssom's old paramour, Lady Heather (Melinda Clarke), is also scheduled to make an appearance.

"In the special two-hour series finale, a catastrophic event paralyzes Las Vegas, and Gil Grissom, Catherine Willows (Marg Helgenberger) and Jim Brass (Paul Guilfoyle) return to help the team with the investigation," CBS announced on Monday. "Also, D.B. Russell (Ted Danson) and Sara Sidle make decisions regarding the future of their crime-fighting careers, and Lady Heather returns, creating maniacal controversy between Grissom and Sidle."

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Could the 15-year series conclude with a romantic reconciliation between two of its most beloved leads? One can certainly hope so. After all, the two-hour event is set to be fan-friendly, despite including at least one notable death.

"This will be a very satisfying ending for all the CSI fans," CBS Entertainment Chairman Nina Tassler stated at the Television Critics Association summer press tour on Monday, according to CBS.

Learn more when the cast of CSI: Las Vegas takes on their final case on Sept. 27. Click the video below to see a preview for the season 15 finale.

Tags: CSI: Crime Scene Investigation television CBS