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.
22,000 people agreed to clean toilets for WiFi because they did not read the terms.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
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.