Table:
0
A
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G
1
Episode
Title
Story
Adapted by
Director
Airdate
Exists?
2
201
“ The Machine Stops ”
E. M. Forster
Kenneth Cavender & Clive Donner
Phillip Saville
6 October 1966
Yes
3
202
“Frankenstein Mark II”
Hugh Whitmore
n/a
Peter Duguid
13 October 1966
No
4
203
“Lambda 1”
Colin Kapp
Bruce Stewart
George Spenton-Foster
20 October 1966
Yes
5
204
“ Level Seven ”
Mordecai Roshwald
J. B. Priestley
Rudolph Cartier
27 October 1966
Yes
6
205
“Second Childhood”
Hugh Leonard
n/a
John Gorrie
10 November 1966
No
7
206
“The World in Silence”
John Rankine
Robert Gould
Naomi Capon
17 November 1966
No
8
207
“The Eye”
Henry Kuttner
Stanley Miller
Peter Sasdy
24 November 1966
No
9
208
“ Tunnel Under the World ”
Frederik Pohl
David Campton
Alan Cooke
1 December 1966
Yes
10
209
“The Fastest Draw”
Larry Eisenberg
Hugh Whitmore
Herbert Wise
8 December 1966
No
11
210
“Too Many Cooks”
Larry Eisenberg
Hugh Whitmore
John Gibson
15 December 1965
No
12
211
“Walk's End”
William Trevor
n/a
Ian Curteis
22 December 1966
No
13
212
“ Satisfaction Guaranteed ”
Isaac Asimov
Hugh Leonard
John Gorrie
29 December 1966
No

Questions and formulas:
Question: What is the airdate when the story is listed as hugh leonard?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,C1="Hugh Leonard"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G13,C2:C13="Hugh Leonard"),6))
Level: medium