John Bonham ... Himself - Drummer (as Led Zeppelin)
John Paul Jones ... Himself - Bassist/Keyboardist (as Led Zeppelin)
Jimmy Page ... Himself - Guitarist (as Led Zeppelin)
Robert Plant ... Himself - Lead Singer (as Led Zeppelin)
Peter Grant ... Himself - Band Manager
rest of cast listed alphabetically:
Jason Bonham ... Himself
Patricia Bonham ... Herself
Richard Cole ... Himself - Led Zeppelin Tour
Roy Harper ... Himself
Carmen Plant ... Herself
Karac Plant ... Himself
Maureen Plant ... Herself
The film must not be judged with today's yardstick. We must appreciate that first of all The Song Remains The Same was probably never meant to be a film but a visual of what a Led Zeppelin concert was all about and even more probably meant for their musical fans and others interested in rock music. I've seen this film several times when I was still a young school boy. By then I was already familiar with the Music and the many variations of the main scores which Led Zeppelin were already renowned for.
I disagree with your correspondent who judged the band by virtue of this film and stated that Led Zeppelin is the most over rated band. There are many musicians I don't mind calling geniuses such as Mike Oldfield, Queen, Beatles, Pink Floyd etc. But certainly Led Zeppelin deserve to be at the top of the list with songs such as Kashmir, Heartbreaker, Black Dog, Stairway to Heaven, Dazed and Confused, In the Light, Whole Lotta Love, Battle of Evermore and my all time favourite Since I've been Loving You.
My advice - before seeing the film become familiar with the great songs.