Ahsoka leaves the Jedi Order (Season 5 Episodes 18-20)

After Ahsoka was framed for the crime of killing Letta Turmond, she escaped prison with the hope to find out who really committed the crime and got her arrested. She escapes her masters and the other clones attempts at getting her back into the prison. When she reaches the Underworld, she meets up with Asajj Ventress who helps her find evidence to prove her innocence while she is trying to keep from getting caught by Republic authorities.

Ahsoka also receives help from Barriss Offee from inside the Temple. She tells them to visit a warehouse where she believes the nanobots used to blow up the temple had come from. Ventress brings Ahsoka to the warehouse and then leaves her there. Later, Ventress is attacked by someone who steals her lightsabers. While Ahsoka is at the warehouse, she is attacked by the unknown person who had stolen Ventress's lightsabers. When Ahsoka finally discovers the nanobots, she is discovered by the clones and Anakin. They stun her so that she can return to the temple for her trial without a struggle.

The council deems her guilty of all crimes and she is removed of her status as a Padawan and a Commander in the Republic army. She is then put on trial by the Republic. While that is going on, Anakin goes after Ventress in search of more answers that may set Ahsoka free. Ventress tells him that Barriss had told Ahsoka about the warehouse and also tells him that whoever had committed the crime Ahsoka is being accused for, would be the one who had stolen her lightsabers. Anakin goes back to the temple to speak with Barriss about what she had told Ahsoka and finds out that she was responsible for everything that was going on. They fight and Anakin takes Barriss to the Republic court before Ahsoka is given her sentence. Ahsoka, Anakin, and a few other Jedi masters return to the temple to ask Ahsoka to come back to the Temple as a Padawan again.

After everything the Council had put her through, she declines. She leaves the Council chambers and begins to leave the Temple. Anakin catches up to her and begs her to reconsider. She tells him that she appreciates everything he has done for her but she tells him that she needs to figure things out on her own before she decides to return or not. She leaves Anakin behind and doesn't turn back.