Table:
0
A
B
C
D
E
F
1
Episode no.
Title
Director
Writer(s)
Original Air Date (ATV)
Production no.
2
1
" A Case for the Bishop "
Alan Perry
Gerry and Sylvia Anderson
21 September 1969
1
3
2
" A Question of Miracles "
Leo Eaton
Donald James
28 September 1969
2
4
3
" To Catch A Spy "
Brian Heard
Pat Dunlop
5 October 1969
4
5
4
"The Feathered Spies"
Ian Spurrier
Tony Barwick
12 October 1969
3
6
5
"Last Train to Bufflers Halt"
Alan Perry
Tony Barwick
19 October 1969
5
7
6
"Hole in One"
Brian Heard
Shane Rimmer
26 October 1969
8
8
7
"Recall to Service"
Peter Anderson
Pat Dunlop
2 November 1969
7
9
8
"Errand of Mercy"
Leo Eaton
Tony Barwick
9 November 1969
6
10
9
"The Deadly Whisper"
Leo Eaton
Donald James
16 November 1969
11
11
10
"The Cure"
Leo Eaton
Pat Dunlop
23 November 1969
10
12
11
"School for Spies"
Ken Turner
Donald James
30 November 1969
9
13
12
"May-Day, May-Day!"
Alan Perry
Bob Kesten
7 December 1969
12

Questions and formulas:
Question: What was the original air date (atv) of the episode "Recall to Service"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Recall to Service"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F13,B2:B13="Recall to Service"),5))
Level: medium
Question: Who was the director of the episode originally aired on 26 October 1969?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="26 October 1969"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F13,E2:E13="26 October 1969"),3))
Level: medium
Question: What is the lowest production number?
Formula: MIN(F1)
Formula2: MIN(F2:F13)
Level: easy
Question: What is the title of the episode with the original air date of 28 September 1969?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="28 September 1969"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F13,E2:E13="28 September 1969"),2))
Level: medium
Question: What was the original air date (atv) of episode 1?
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=1))
Formula2: LET(query1,SUMMARIZE(E2:E13,SUMX(A2:A13)),FILTER(query1,CHOOSECOLS(query1,2)=1))
Level: hard