The First Episode

Going on Netflix you'll see the first episode is "Bubbler" but the first episode is actually "Ladybug and Cat Noir Origins Part 1-2" where they first get their miraculous and defeat akumatized villain, Stoneheart who is also known as Ivan Bruel. In the episode, The guardian of the miraculous tested the civilians of Paris because he is 186 years old and after receiving help from classmates, Marinette Dupain-Cheng and Adrien Agreste, gave them the miraculous of the ladybug and black cat. After defeating the villain, Ladybug forgets to capture the akuma resulting in it to multiply multiple times and akumatize many citizens but only until Ivan's emotions rised and he got akumatized again, could the other stone-beings move, other than that, they were completely still. After failing to capture the akuma and starting all these problems, Marinette thinks it best if she give the miraculous to someone else, her best friend Alya but while trying to give her the miraculous secretly Alya didn't notice and ran off which ended in her getting stuck behind a car and Marinette decided that she had to be Ladybug. She ended up saving everyone and showing people that her and Cat Noir were not gonna let Paris down.