Spock/Starfleet/Death & Resurrection

Sometime after the V'ger incident, Spock was promoted to captain and assigned to Starfleet Academy where he trained cadets on the Enterprise which had been retired from active service.
In early 2285, Spock, while on a training mission, ceded command of the Enterprise to Kirk during a mission that involved keeping the Genesis Device from Khan Noonien Singh. When Kirk and the Enterprise defeated Khan, he armed the device. Spock repaired the Enterprises warp drive in a severely irradiated portion of engineering in order to save the crew. He saved the ship but sacrificed his own life in the process. Following his funeral service, Kirk gave Spock a "burial by sea" by firing Spock's body into space inside a torpedo casing. ()
Spock's coffin landed on the surface of the . The radiation emanating from the planet regenerated his cells. Spock was thus reborn as a child but quickly aged to adulthood. However, his mind was a complete blank. Kirk and the rest of the Enterprises senior staff disobeyed Starfleet orders so that they could retrieve Spock's body. On Vulcan, Spock's living body, now at the age of his death, was reunited with his katra which Spock himself had placed in McCoy prior to his death via mind meld. ()
After his katra and body were re-integrated, Spock trained for three months with the help of his mother to bring his knowledge and intellect back to where it had been before he died. Answering many complicated questions at rapid fire during his memory test, he had difficulty answering the question "How do you feel?", something he felt was irrelevant, though his mother disagreed. Returning back to Earth aboard the with his Enterprise crewmates to offer testimony in their defense to the Federation Council, Spock and the crew discovered that the planet was under siege by a mysterious alien probe which was causing critical damage to Earth's oceans and subsequently Earth's ecosystem. Analyzing the transmission the probe was producing, Spock concluded that the probe was transmitting the songs sung by whales, specifically humpback whales. Spock informed Kirk that the humpback whales had been extinct since the 21st century and suggested the crew travel back through time to acquire humpback whales. Spock's calculations from memory for the slingshot effect around Sol proved instrumental in the Bountys successful journey back to the year 1986.
Upon the landing of the cloaked Bird-of-Prey in Golden Gate Park, Spock teamed up with Kirk and together they set off in search of humpback whales. The pair discovered George and Gracie at the Cetacean Institute in Sausalito. Spock jumped into the whales' tank and mind melded with Gracie, discovering she was pregnant. After traveling back to 2286 with the whales and cetacean biologist Gillian Taylor, Spock and the rest of the crew saved Earth once again by releasing George and Gracie into the San Francisco Bay from the sunken Bounty. The whales successfully communicated with the probe and it left Earth's solar system. After the dismissal of all charges to the crew of the Enterprise, save for Kirk, Spock spoke to his father and asked him to relay a message to his mother: That he felt fine. Spock went on to serve as a Starfleet officer for several more years aboard the new . ()