Table:
0
A
B
C
D
E
F
1
No. in series
Title
Directed By
Written By
air date
Production code
2
1
"A Harvest of Friends"
Michael Landon
Blanche Hanalis , John Hawkins & William Putman
September 11, 1974
1002
3
2
"Country Girls"
William F. Claxton
Blanche Hanalis & Juanita Bartlett
September 18, 1974
1001
4
3
"100 Mile Walk"
William F. Claxton
Blanche Hanalis & Ward Hawkins
September 25, 1974
1003
5
4
"Mr. Edwards' Homecoming"
Michael Landon
Blanche Hanalis & Joel Murcott
October 2, 1974
1004
6
5
"The Love of Johnny Johnson"
William F. Claxton
Blanche Hanalis & Gerry Day
October 9, 1974
1005
7
6
"If I Should Wake Before I Die"
Victor French
Blanche Hanalis & Harold Swanton
October 23, 1974
1006
8
7
"Town Party, Country Party"
Alf Kjellin
Blanche Hanalis & Juanita Bartlett
October 30, 1974
1007
9
8
"Ma's Holiday"
Leo Penn
Blanche Hanalis & Dale Eunson
November 6, 1974
1010
10
9
"School Mom"
William F. Claxton
Blanche Hanalis , Ward Hawkins & Jean Rouverol
November 13, 1974
1011
11
10
"The Raccoon"
William F. Claxton
Blanche Hanalis & Joseph Bonaduce
November 20, 1974
1013
12
11
"The Voice of Tinker Jones"
Leo Penn
Tony Kayden & Michael Russnow
December 4, 1974
1012
13
12
"The Award"
William F. Claxton
Michael Landon
December 11, 1974
1014
14
13/14
"The Lord is My Shepherd"
Michael Landon
Michael Landon
December 18, 1974
1008/1009
15
15
"Christmas at Plum Creek"
William F. Claxton
Arthur Heinemann
December 25, 1974
1015
16
16
"Family Quarrel"
William F. Claxton
Ward Hawkins
January 8, 1975
1016
17
20
"Child of Pain"
Victor French
John Meston
February 12, 1975
1020
18
21
"Money Crop"
Leo Penn
Teleplay by: Ward Hawkins Story by: John Meston
February 19, 1975
1021

Questions and formulas:
Question: When 1008/1009 is the production code how many directors are there?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="1008/1009"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F18,F2:F18="1008/1009"),3))
Level: medium
Question: When arthur heinemann is the writer who is the director?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="Arthur Heinemann"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F18,D2:D18="Arthur Heinemann"),3))
Level: medium