Epidemic (S10E1)
1/4/1973
Worlds in Collision (S10E2)
1/11/1973
The Military Necessity (S10E3)
1/18/1973
The Curtain of Silence (S10E4)
1/25/1973
Crime Lab (S10E5)
2/1/1973
When the Breeding Has to Stop (S10E6)
2/8/1973
Science Is Dead, Long Live Science (S10E7)
2/15/1973
...And Where Will the Children Play? (S10E8)
3/1/1973
Acupuncture: A Chinese Puzzle (S10E9)
3/8/1973
What Time Is Your Body? (S10E10)
3/22/1973
Survival of the Weakest (S10E11)
4/5/1973
Red Sea Coral and the Crown of Thorns (S10E12)
4/12/1973
Lumbered... with Back-Ache! (S10E13)
4/26/1973
Airport (S10E14)
5/3/1973
Do You Remember the Memory Man? (S10E15)
5/17/1973
What a Waste! (S10E16)
5/24/1973
The Laws of the Land (S10E17)
6/7/1973
Do We Really Need the Railways? (S10E18)
6/14/1973
The Telly of Tomorrow? (S10E19)
6/21/1973
How Does It Hurt? (S10E20)
7/5/1973
A Scientist Looks at Religion (S10E21)
8/9/1973
In Search of Konrad Lorenz (S10E22)
9/24/1973
Stretch Up Tall (S10E23)
10/1/1973
Gilding the Lily (S10E24)
10/8/1973
The Black Holes of Gravity (S10E25)
10/15/1973
What's so Big About Us? (S10E26)
10/22/1973
The Steadfast Tin Soldier (S10E27)
10/29/1973
Carry on Smoking (S10E28)
11/5/1973
Air Crash Detective (S10E29)
11/26/1973
An Element of Mystery (S10E30)
12/3/1973
Digging Up the Future (S10E31)
12/17/1973
Kula, a Reason for Giving (S10E32)
12/24/1973
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