Table:
0
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1
Episode
Title
Story
Adapted by
Director
Airdate
Exists?
2
401
“Taste of Evil”
John Wiles
n/a
Michael Ferguson
21 April 1971
No
3
402
“To Lay A Ghost”
Michael J. Bird
n/a
Ken Hannam
28 April 1971
Yes
4
403
“This Body Is Mine”
John Tully
n/a
Eric Hills
5 May 1971
Yes
5
404
“Deathday”
Angus Hall
Brian Hayles
Raymond Menmuir
12 May 1971
Yes
6
405
“The Sons and Daughters of Tomorrow”
Edward Boyd
n/a
Gerald Blake
19 May 1971
No
7
406
“Welcome Home”
Moris Farhi
n/a
Eric Hills
26 May 1971
Yes
8
407
“The Last Witness”
Martin Worth
n/a
Michael Ferguson
2 June 1971
No
9
408
“The Man in My Head”
John Wiles
n/a
Peter Cregeen
9 June 1971
Yes
10
409
“The Chopper”
Nigel Kneale
n/a
Peter Cregeen
16 June 1971
No
11
410
“The Uninvited”
Michael J. Bird
n/a
Eric Hills
23 June 1971
No
12
411
“The Shattered Eye”
David T. Chantler
n/a
Peter Hammond
30 June 1971
No

Questions and formulas:
Question: What was the title of the episode that martin worth wrote the story for?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,C1="martin worth"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G12,C2:C12="martin worth"),2))
Level: medium