Episodes in which Clark Kent revealed his identity to Lois Lane:

1
In a 1957 episode called "The Big Forget", Clark revealed his true identity to Lois and Jimmy, but they forget everything after inhaling an antimemory vapor created by Professor Pepperwinkle.
Source: Total Television, McNeil, 1/1/1900

 
   
  Location of the world's largest Superman museum:

Metropolis, Illinois
Seeking to capitalize on the similarity of its name and the city where Superman patrolled the skies, the town fathers have developed not only the world's largest Superman museum with some 75,000 artifacts, but also the world's largest Superman statue.
Source: Muncie Star Press, 7/2/2006

 
   
  First year in which Superman was filmed in color:

1954

Source: Total Television, McNeil, 1/1/1900

 
   
  Person who played Police Inspector William Henderson in Superman :

Robert Shayne

Source: Total Television, McNeil, 1/1/1900