Episode 75 of "Sabrina, the teenage witch"
s03e25 The Good, The Bad And The Luau

In the season 3 final. Sabrina's aunts decide to go on Holiday to Hawaii. It may be fun in the sun for Hilda and Zelda, but as Sabrina has yet to solve her family secret, she is confined into a boring grubby bedroom, where she is given her Family secret board, and has to solve the family secret. Meanwhile back at home Harvey and Salem are able to talk thanks to a little spell made by Sabrina. Salem finds a cat who is pregnant and ready to conseve, but keeps crying. Sabrina gets given her final clue from a family relative which is a ball of twine. Clueless Sabrina goes to Salem for answers and he tells her it is not cotten which Sabrina thinks, but a ball of twine. He then asks Sabrina to take away the pregnant cats pain and Sabrina does a little spell and all goes well...for now. Sabrina returns back and adds the ball of twine to the board and starts to read what she has so far "Every member of the spellman family is born with twine?" but she looks next to the picture which is minus e "Minus the e...twin. That's it! Every member of the Spellman family is born with a twin!" Sabrina has finally solved it and her room in transformed into a luxuary hawian room, and she is transformed to the beach with her aunts. Sabrina meets her twin sister and the two hang out together, but when Sabrina finds out that one of the twins is evil Sabrina wonders what to do. A trial at the beach is in order to find out who is good and who is evil, Sabrina wins some and so does Katrina, while looking over good and bad acts made by the two. Sabrina sadly is set as the evil witch and her death will be later in the day. Back at home Harvey's mother becomes pregnant with kittens thanks because of Sabrina's spell, finding out Sabrina comes back home and fixes this little problem, and knowing she is going to die she says good bye to Harvey. When returning back Sabrina, Katrina, the judge and Hilda and Zelda travel on top of a volcano where Sabrina is going to go, the judge asks Katrina to push Sabrina in and she happily agrees. The judge questions this saying if she was really good she wouldn't of pushed Sabrina in, thankfully Sabrina holds on for dear life dangeling inside the volcano, as Katrina is named the evil witch and set to life in prison. Back at home Sabrina allows Harvey to take the cat and her new kittens home, with an upset Salem.