Table:
0
A
B
C
D
E
1
Episode
Broadcast date
Run time
Viewers (in millions)
Archive
2
" Episode 1 "
23December1967
23:45
6.8
16mm t/r
3
" Episode 2 "
30December1967
23:48
7.6
16mm t/r
4
" Episode 3 "
6January1968
23:05
7.1
16mm t/r
5
" Episode 4 "
13January1968
23:46
7.8
16mm t/r
6
" Episode 5 "
20January1968
24:22
6.9
16mm t/r
7
" Episode 6 "
27January1968
21:41
8.3
16mm t/r

Questions and formulas:
Question: Which archive has a run time of 23:48?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="23:48"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,C2:C7="23:48"),5))
Level: medium
Question: Which broadcast date has 6.8 million viewers?
Formula: LET(query1,SUMMARIZE(B1,SUMX(D1)),FILTER(query1,CHOOSECOLS(query1,2)=6.8))
Formula2: LET(query1,SUMMARIZE(B2:B7,SUMX(D2:D7)),FILTER(query1,CHOOSECOLS(query1,2)=6.8))
Level: hard