Techno Turtle / Surprise! / Got Your Goat

S2, E16: "Techno Turtle": When Dee Dee rescues a wounded turtle from a hawk's talons, Dexter helps rebuild the little shelled animal into a bionic powerhouse. Dee Dee and the turtle become friends until the day the turtle returns to the wild and beats up the hawk. / "Surprise": It's Dexter's birthday and he's intent on sneaking a peak at his presents. In order to get around Mom, Dad and the vigilant Dee Dee, he makes himself invisible. / "Got Your Goat": Dee Dee shows Dexter a picture of the Chupacabra only to have him realize that it's Charlie, one of his biological mutations/inventions that escaped. Dee Dee and Dexter fly to Puerto Rico to retrieve his "pet."