Table:
0
A
B
C
D
E
F
1
#
Episode
Writer
Director
Original air date
Viewing figure
2
11
"Episode 1"(75-minute Christmas special)
Bill Gallagher
Alan Grint
21December2008
6.58 million
3
12
"Episode 2"
Bill Gallagher
Alan Grint
4January2009
6.53 million
4
13
"Episode 3"
Bill Gallagher
Alan Grint
11January2009
6.13 million
5
14
"Episode 4"
Carolyn Bonnyman
Maurice Phillips
18January2009
6.49 million
6
15
"Episode 5"
Bill Gallagher
Julian Holmes
25January2009
6.31 million
7
16
"Episode 6"
Gaby Chiappe
Moira Armstrong
1February2009
6.54 million
8
17
"Episode 7"
Gaby Chiappe
Sue Tully
8February2009
6.14 million
9
18
"Episode 8"
Kate Gartside
Alan Grint
15February2009
6.20 million
10
19
"Episode 9"
Kate Gartside
David Tucker
22February2009
6.32 million
11
20
"Episode 10"
Carolyn Bonnyman
Patrick Lau
1March2009
6.34 million
12
21
"Episode 11"
Gaby Chiappe
Paul Marcus
8March2009
6.78 million

Questions and formulas:
Question: Who is the director of the episode at entry number 13? 
Formula: LET(query1,SUMMARIZE(D1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=13))
Formula2: LET(query1,SUMMARIZE(D2:D12,SUMX(A2:A12)),FILTER(query1,CHOOSECOLS(query1,2)=13))
Level: hard
Question: Who wrote the episode that David Tucker directed?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="David Tucker"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,D2:D12="David Tucker"),3))
Level: medium
Question: Which episode has been viewed 6.34 million times? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="6.34 million"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,F2:F12="6.34 million"),2))
Level: medium
Question: What is the original air date of the episode directed by Paul Marcus?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="Paul Marcus"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,D2:D12="Paul Marcus"),5))
Level: medium
Question: Which numerical entry corresponds to "Episode 9"?
Formula: SUMIFS(A1,B1,"Episode 9")
Formula2: SUMIFS(A2:A12,B2:B12,"Episode 9")
Level: easy