Conversation so far:
what caliber of rifle did the rifleman use
the rifle used on the set of The Rifleman, an 1892 Winchester caliber .44-40
Who is in the tv show the Rifleman
The rifleman stars Chuck Connors as rancher Lucas McCain and Johnny Crawford as his son Mark McCain
Where was the TV show The Rifleman set
The Rifleman was set in the 1880s in the fictional town of North Fork, New Mexico Territory
When did the tv show The Rifleman air
The Rifleman aired from September 30, 1958, to April 8, 1963.

Question: In what network
Self-contained rewrite: In what network did The Rifleman aired