5x1 - "Good and Evil"

January 3, 1965

5x2 - "Viruses"

January 10, 1965

5x3 - "Survival"

January 17, 1965

The problem of survival in extreme climatic conditions is examined by Dr. William Whitehead.

5x4 - Eureka

January 24, 1965

Discussion and demonstration of "accidental" scientific discoveries.[37]

5x5 - Flight

January 31, 1965

Lister Sinclair looks at the artificial flight techniques of man and some of the principles of flying used by other species.

5x6 - "The Quaking Earth"

February 7, 1965

5x7 - Pain

February 21, 1965

5x9 - Photography

March 14, 1965

Dr. Walter Clark of the Eastman-Kodak Research Laboratory, and host Lester Sinclair explain what happens after you push the button of your camera.

5x10 - "Bird Strikes on Aircraft"

March 21, 1965

At one time, collisions between aircraft and birds usually hurt only the birds. Now, with aircraft flying at supersonic speeds, the impact of collisions is greater. And birds ingested into the engines have caused a number of crashes. The Nature of Things looks at what is being done to eliminate bird strikes on aircraft.

5x11 - "The Pacemakers"

March 28, 1965

For the first time ever on television, part of the remarkable "pacemaker" heart operation is shown being performed at the Toronto General Hospital.