Table:
0
A
B
C
D
E
1
Episode
Broadcast date
Run time
Viewers (in millions)
Archive
2
" Part One "
4May1974
24:40
10.1
PAL 2" colour videotape
3
" Part Two "
11May1974
25:02
8.9
PAL 2" colour videotape
4
" Part Three "
18May1974
24:58
8.8
PAL 2" colour videotape
5
" Part Four "
25May1974
23:53
8.2
PAL 2" colour videotape
6
" Part Five "
1 June 1974
24:01
9.2
PAL 2" colour videotape
7
" Part Six "
8 June 1974
24:43
8.9
PAL 2" colour videotape

Questions and formulas:
Question: What are all the run times with 8.2 million viewers?
Formula: LET(query1,SUMMARIZE(C1,SUMX(D1)),FILTER(query1,CHOOSECOLS(query1,2)=8.2))
Formula2: LET(query1,SUMMARIZE(C2:C7,SUMX(D2:D7)),FILTER(query1,CHOOSECOLS(query1,2)=8.2))
Level: hard
Question: What are all the episodes with an episode run time of 24:01?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="24:01"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,C2:C7="24:01"),1))
Level: medium
Question: How many episodes had a broadcast date and run time of 24:43?
Formula: ROWS(UNIQUE(FILTER(B1, C1="24:43")))
Formula2: ROWS(UNIQUE(FILTER(B2:B7, C2:C7="24:43")))
Level: medium