It seems there are some of us that don't remember
Grand Central Studios. There were St 41..42 .43..44..... St 43 was Film Control.
Late Show ..E.T.C.S.T. 44 was a small Studio.. Too small for large Productions.
A . Master Control ...T.V.R.. Telecine.. and Video Tape..
I will let the production People tell you of the great shows that came from these Studios.
P.S. I forgot Vidicon Valley..