Table:
0
A
B
C
D
E
1
Episode
Broadcast date
Run time
Viewers (in millions)
Archive
2
" Episode One "
30September1967
24:15
6.3
Only stills and/or fragments exist
3
" Episode Two "
7October1967
23:15
6.0
16mm t/r
4
" Episode Three "
14October1967
23:55
7.1
Only stills and/or fragments exist
5
" Episode Four "
21October1967
24:11
7.1
Only stills and/or fragments exist
6
" Episode Five "
28October1967
23:51
7.2
Only stills and/or fragments exist
7
" Episode Six "
4November1967
23:31
7.4
Only stills and/or fragments exist

Questions and formulas:
Question: How many viewers in millions watched the episode 23:55 minutes long?
Formula: SUMIFS(D1,C1,"23:55")
Formula2: SUMIFS(D2:D7,C2:C7,"23:55")
Level: easy
Question: What is the broadcast date of the 16mm t/r episode?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="16mm t/r"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,E2:E7="16mm t/r"),2))
Level: medium
Question: How many viewers watched the 16mm t/r episode?
Formula: SUMIFS(D1,E1,"16mm t/r")
Formula2: SUMIFS(D2:D7,E2:E7,"16mm t/r")
Level: easy