Scare Tactics is the first part of the first part of the 13th and final episode in season 3 of Dexter's Laboratory, which first aired on September 20, 2002. In this episode, Dad and Dexter stay up late and watch a horror movie. After watching it, they both become paranoid of what's going on around them.
This episode was meant to air in the summer of 2002, but ended up being delayed until September 20th.
Although this episode aired on September 20, 2002, it was actually made in 2001 according to the credits.