This is Grissoms last episode, and is the end of an era for CSI fans, but provides an introduction to Dr Ray Langston who is investigating serial killers at Grissoms request.
The strength and bond between the remaining characters is shown here as they face up to a reality without Grissom. It ends with an emotional reunion between Grissom and Sara.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.
Confused Apple customers are finding coins in their MacBooks.
High levels of iron help prevent hearing loss, a study has claimed.
A software engineer has constructed a fingernail-sized engine made of paper and it totally works!
Conspiracy theorists claim that there is a mysterious alien based pyramid in the Antarctic.
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