Answer by taking a quote from the following article:

Obi-Wan "Ben" Kenobi is a fictional character in the Star Wars franchise. Within the original trilogy he is portrayed by Alec Guinness, while in the prequel trilogy a younger version of the character is portrayed by Ewan McGregor. In the original trilogy, he is a mentor to Luke Skywalker, to whom he introduces the ways of the Jedi. In the prequel trilogy, he is a master and friend to Anakin Skywalker.

Obi-Wan Kenobi is a main character in the animated micro-series Star Wars: Clone Wars and the CGI animated series Star Wars: The Clone Wars, voiced by James Arnold Taylor. In both series, Obi-Wan is a general in the Clone Wars, and he and Anakin have many adventures fighting the Separatists. The latter series highlights his numerous confrontations with General Grievous, his adversarial relationship with Dark Jedi Asajj Ventress, his romance with Duchess Satine Kryze, and the return of his old enemy Darth Maul.  In Star Wars Rebels, set five years before A New Hope, Obi-Wan appears as a hologram in the pilot episode "Spark of Rebellion". In the Season 3 episode "Visions and Voices", protagonist Ezra Bridger discovers that Obi-Wan is alive on Tatooine; Obi-Wan's old nemesis Darth Maul finds him as well. In the episode "Twin Suns", Maul is shown wandering the desert of Tatooine searching for Obi-Wan. Maul lures Ezra and uses him to draw Obi-Wan out. Obi-Wan rescues Ezra from dying from heat exhaustion and advises him to stay with the Rebellion. Maul appears and engages Obi-Wan in a lightsaber duel, but Obi-Wan mortally wounds him. With his dying breath, Maul asks Obi-Wan if he is protecting the "Chosen One"; Obi-Wan replies that he is. After Maul's death, Obi-Wan is seen watching over Luke Skywalker from a distance.  In Rebels, Obi-Wan was voiced by Stephen Stanton, who replaced James Arnold Taylor. Rebels creator Dave Filoni, who worked with the character during the full duration of Star Wars: The Clone Wars, said he considered asking McGregor to reprise and voice the role.

Was there a highly rated episode?