Ep 4. Sis-Tem Error

Dexter's Laboratory season 4 episode 4, titled "Sis-Tem Error," follows Dexter as he tries to upgrade his computer system. The episode opens with Dexter in his laboratory, frustrated by his outdated computer system. He decides that it's time to upgrade to a new system, but he doesn't want to do it alone.

Dexter's sister, Dee Dee, volunteers to help him with the upgrade. Dexter is hesitant to accept her help, but he eventually agrees. Dee Dee is excited to help Dexter, and she quickly gets to work on the upgrade.

As Dee Dee works on the computer system, she accidentally activates a virus that infects the entire system. Dexter and Dee Dee try to fix the problem, but they quickly realize that they need more help.

Dexter asks his friend, Mandark, for assistance. Mandark is happy to help, but he soon becomes frustrated by Dee Dee's constant interruptions. Dee Dee is determined to help, but her lack of technical knowledge is causing more harm than good.

Eventually, Dexter and Mandark are able to isolate the virus and remove it from the system. However, they soon discover that the virus was not an accident. Someone had purposely installed the virus in order to sabotage Dexter's system.

Dexter and his friends set out to find the culprit, but they quickly realize that they may be in over their heads. The hacker is sophisticated and elusive, and Dexter is afraid that he may never be able to track them down.

In the end, Dexter is able to catch the hacker and restore his computer system to its former glory. Dee Dee and Mandark are both impressed with Dexter's technical skills, and they vow to help him with any future upgrades.

Overall, "Sis-Tem Error" is a fun and exciting episode of Dexter's Laboratory that will keep viewers on the edge of their seats. The episode is full of action, adventure, and humor, and it showcases the unique relationship between Dexter and his sister, Dee Dee.