Star Trek Discovery Episode 108 "Si Vis Pacem Para Bellum (If You Want Peace, Prepare For War)"
Saru is at peace on Pahvo.. and he doesn't want to leave..EVER!!
Episode 108: Si Vis Pacem Para Bellum (If You Want Peace, Prepare For War)
Coming to the aid of another Federation ship, the Discovery is unable to prevent its destruction from a Klingon ship with their cloaking technology. Desperate for a way to detect these ships even when they are cloaked, Burnham, Tyler, and Saru are sent to Pahvo, a seemingly uninhabited planet with a naturally occurring crystalline transmitter that broadcasts the planet's vibrational frequency into space. They hope to use the transmitter to create a sonar for the hidden Klingon ships. They discover that Pahvo is inhabited with indigenous life that introduce Saru to their higher understanding of peace, and he attempts to force Burnham and Tyler to remain with him on the planet forever. Burnham is able to fight off Saru and broadcast the new signal. However, the Pahvo lifeforms adjust the signal to contact the Klingons as well, hoping to end the war. Kol receives the signal, after sentencing L'Rell to death: she had tried to help Cornwell escape in exchange for protection from Kol, leading to L'Rell apparently killing Cornwell to try save face with Kol.