There is actually 2 episodes, the first one is when Zuko finds the necklace and the seond one is when Zuko shows Katara's Neckalace.
Soo The first one is Book 1-Water Episode 6-Imprisoned. At the end is when zuko finds Katara's Necklace the the second one is Book 1- Water, Episode ___ -The Waterbending Scroll.
episode 173
season 3 episode 20 called "win, lose and kaboom"
Wheelers and Dealers Season 10 Episode 6
Series 4, episode 13: Journey's End.
I saw it in the last tournament of the manga.
Mme.forestier's necklace
Madame Loisel loses the necklace while attending a fancy event. She borrows a necklace from a friend, thinking it is real, but later discovers that she has lost it when she returns home. She and her husband then go into debt to replace the lost necklace.
Mulder and Scully lost time in the pilot episode of The X-Files. It happens when they are driving on a road and the car dies. Years later Mulder finds himself in the same location.
episode 173
It definitely loses value, but how much is up for debate. It also depends on the necklace.
Madame Loisel likely lost the necklace while attending the party at the Ministry of Education. It was during the chaos of leaving the party when she noticed the necklace was missing.
I think episode 7
in the episode ike's wee wee
Season 17 Episode 20
Episode 37. Although there are rumors of a 38th episode.
Pikachu loses its memory in the episode titled "A Scare To Remember."
In iParty with Victorious (counted as an iCarly episode) she lost her voice until the very end of the episode