When tracing the IP address of the user "Apollo", Sara briefly explains that they're looking for an IP address. The IP address that appears on her monitor "417.216.55.59" is not a valid IP address. Valid IP addresses can only run from 0.0.0.0 to 255.255.255.255.
When comparing the two bodies at the coroner, Grissom states that the blonde does not have pierced ears, but two holes can be clearly seen on the actress's ear.
The Hunter and his wife were both laid off, according to the wife, yet when checking her alibi, it was determined that she was at work all day.
Sara says that the user Apollo has seven different IP addresses, so she concludes he must have seven different computers. A user on dial up has a dynamic IP address; it changes every time you reconnect. Similarly, a user on cable or DSL will have the same IP address on every computer using the connection.