Mail the invitations 3 to 5 weeks prior to the premiere party. This will give people plenty of time to plan for your event. Ask people to let you know they will be coming and how many people will attend.
Provide light snacks like pretzels or popcorn to satisfy your guests' hunger. "CSI" is shown well after dinner time, so most of your guests will probably have eaten already by the time they show up to your house.
Serve drinks to guests in beaker shaped glasses to create a lab-like setting.
Use caution tape to decorate the room instead of crêpe paper.
Hold a costume contest to see who can dress most like his favorite star from the show. You can even give out awards for the best costume.
Create a quiz centered around the forensic theme of the show. For example, you could ask the question "What is luminal?" The person with the correct answer would win a prize.
Give out bug awards. "CSI" fans all know about Grissom's fascination with insects and bugs. Hide some fake insects and bugs around your house (frozen in an ice cube!) and let guests collect them throughout the night. Give a prize to the person who has collected the most bugs and insects by the end of the night.
Play the "CSI" board game with guests to see just how much they really know about the show. Playing the game just before the premiere can get you and your guests even more excited for the new episode.