I was looking at the transcript for The Voyage Home and noticed that it has flashback scenes at the beginning listed similar to The Search for Spock, with a new captain's log narrating the events.
Is this just something someone made up, is there another version of the film that I haven't seen or were these scenes always there and I'm just crazy?
http://www.chakoteya.net/movies/movie4.html

Is this just something someone made up, is there another version of the film that I haven't seen or were these scenes always there and I'm just crazy?
http://www.chakoteya.net/movies/movie4.html
Captain's log, stardate 8031 in the twenty-third century. As commanding officer of the U.S.S. Enterprise, I look back on our most recent adventure and realise I could not have asked for a more dependable ship or dedicated crew. Chekov, Doctor McCoy, Uhura, Scotty, Sulu, and our late comrade, Spock, whose heroic sacrifice in our last mission is now deeply felt. Our ship and our lives have been endangered by an experimental project called Genesis designed to bring new life to barren moons. We sent Spock's body there to rest in peace.
(scenes from "Star Trek III: The Search for Spock.")
[Kirk's apartment]
SAREK: Why did you leave him on Genesis! Spock trusted you. You denied him his future!
KIRK: I saw no future.
[Electronic center]
SAREK: Only his body was in death, Kirk. ...bring him to us ...and bring that which he gave you ...his living spirit.
[Starfleet officer's lounge]
KIRK: ...if there's a chance that Spock has an eternal soul ...then it's my responsibility. ...Give me back the Enterprise!
MORROW: Out of the question, my friend!
SULU: The word, sir?
KIRK: The word ...is no I am therefore going anyway.
[Spacedock cafeteria]
FIRST OFFICER (on intercom): Sir, someone is stealing the Enterprise!
STARFLEET VOICE: All stations, Yellow Alert!
[Enterprise bridge]
CHEKOV: Sir. Commander, Starfleet on emergency channel. He orders you to surrender this vessel.
KIRK: No reply, Chekov.
SULU: One minute to space doors.
[Excelsior bridge]
STYLES: Kirk! If you do this, you'll never sit in the Captain's chair again.
[Enterprise bridge]
KIRK: Warp speed.
SULU: ...Warp speed.
KIRK: Best speed to Genesis.
Captain's log. (continued) Unfortunately we were not the first to arrive.
[Enterprise bridge]
SULU: Klingon Bird of Prey, sir! She's arming torpedoes!
[Bird-of-Prey bridge]
KIRK (on viewscreen): ...your presence here is an act of war.
KRUGE: Fire!
Captain's log. (continued) Quickly overpowered, we had no choice but to allow the Klingons aboard, which meant the only way to defeat them was to destroy the Enterprise.
[Enterprise bridge]
TORG: ...The ship appears to be deserted.
[Bird-of-Prey bridge]
KRUGE: ...They're hiding!
Captain's log. (continued) Leaving our ship for the last time we fled to Genesis.
[Bird-of-Prey bridge]
COMPUTER VOICE: ...five,...
KRUGE: Get out! Get out...
[Genesis planet - Kirk's landing]
KIRK: ...What have I done?
McCOY: What you had to do...
Captain's log. (continued) Just as the planet began to self-destruct we found Spock, and he was alive. His body had been regenerated but his mind was blank. Escaping Genesis we used the captured Klingon vessel to transport us to Vulcan where a mysterious ceremony was performed by Spock's people in an attempt to restore his memory.
[Vulcan temple area - sunrise]
SPOCK: ...You came back for me.
KIRK: You would have done the same for me.
SPOCK: Why would you do this?
KIRK: Because the needs of the one ...outweigh the needs of the many.
Captain's log. (continued) Meanwhile, back on Earth, the punishment for our disobedience awaited us.
