Table:
0
A
B
C
D
E
F
G
1
#
Title
Director
Writer(s)
Originalairdate
Repeatairdate(s)
Prod.Code
2
1
"The Magic Shillelah"
Hollingsworth Morse
Frank Crow Leo Rifkin
15/09/1968
16/03/1969, 03/08/1969
30-14
3
2
"Huck Of La Mancha"
Hollingsworth Morse
George Eckstein
22/09/1968
26/01/1969
30-9
4
3
"The Terrible Tempered Kahleef"
Bruce Bilson
Joanna Lee
29/09/1968
23/03/1969, 24/08/1969
30-7
5
4
"The Little People"
Walter S. Burr
(Unknown)
06/10/1968
30/03/1969, 31/08/1969
30-3
6
5
"Pirate Island"
Byron Haskin
Kenneth L. Kolb
13/10/1968
13/04/1969, 17/08/1969
30-4
7
6
"The Last Labor of Hercules"
Hollingsworth Morse
David Duncan
20/10/1968
06/04/1969, 08/10/1969
30-6
8
7
"The Gorgon's Head"
Hollingsworth Morse
Herman Miller
27/10/1968
N/A
30-16
9
8
"The Castle Of Evil"
Walter S. Burr
Kenneth L. Kolb
03/11/1968
20/04/1969
30-5
10
9
"Hunting The Hunter"
Hollingsworth Morse
Kenneth L. Kolb
24/11/1968
27/04/1969
30-11
11
10
"The Curse Of Thut"
Bruce Bilson
David Duncan
01/12/1968
22/06/1969
30-2
12
11
"The Ancient Valley"
Hollingsworth Morse
David Duncan
15/12/1968
29/06/1969
30-13
13
12
"Menace In The Ice"
Walter S. Burr
Peter Allan Fields
22/12/1968
15/06/1969
30-10
14
13
"The Eye Of Doorgah"
Robert Gist
Herman Miller
29/12/1968
13/07/1969
30-1
15
14
"Mission Of Captain Mordecai"
Ezra Stone
Joanna Lee
05/01/1969
11/03/1969
30-8
16
15
"The Jungle Adventure"
Hollingsworth Morse
Bill Lutz
19/01/1969
18/03/1969
30-15
17
16
"Son Of The Sun"
Hollingsworth Morse
Al C. Ward Kenneth L. Kolb
26/01/1969
06/07/1969
30-19
18
17
"Prophecy Of Peril"
Hollingsworth Morse
David Duncan
02/02/1969
27/07/1969
30-17
19
18
"Strange Experiment"
Hollingsworth Morse
Kenneth L. Kolb
09/02/1969
06/07/1969
30-12
20
19
"The Conquistador Curse"
Bruce Bilson
Tom and Helen August
16/02/1969
01/06/1969
30-18

Questions and formulas:
Question: What is the original date of the repeat air date of 26/01/1969?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,F1="26/01/1969"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G20,F2:F20="26/01/1969"),5))
Level: medium
Question: What is the repeat date of the episode that aired 22/12/1968?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1="22/12/1968"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G20,E2:E20="22/12/1968"),6))
Level: medium
Question: who is the writer of the episode with prod.code 30-17
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,G1="30-17"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G20,G2:G20="30-17"),4))
Level: medium
Question: what is the prod.code of the episode with original air date 01/12/1968?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1="01/12/1968"),7))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G20,E2:E20="01/12/1968"),7))
Level: medium