Every TCM showing in the past ten years has been the 2004 version, sadly.
The original is "lost" in the same sense as the OOT is, only the changes have been obfuscated as some sort of restored director's cut, which it is not.
My personal straw on the camel's back moment came when I saw the documentary on the 2004 DVD, which will further confuse future viewers as to what a filmmaker could achieve in 1970.