Table:
0
A
B
C
D
E
F
G
1
Episode
Title
Directed by
Written by
Original airdate
Duration
Viewership
2
1
" Keep On Running "
Tony Dow
John Sullivan
9September2005
30 minutes
8.88 million
3
2
" A Rocky Start "
Tony Dow
John Sullivan
16September2005
30 minutes
6.34 million
4
3
" The Country Wife "
Tony Dow
John Sullivan
23September2005
30 minutes
5.86 million
5
4
" Hay Fever "
Tony Dow
John Sullivan
30September2005
30 minutes
6.33 million
6
5
" Pillow Talk "
Tony Dow
John Sullivan
7October2005
30 minutes
6.63 million

Questions and formulas:
Question: How many people wrote the episode that had 6.34 million viewers?
Formula: ROWS(UNIQUE(FILTER(D1, G1="6.34 million")))
Formula2: ROWS(UNIQUE(FILTER(D2:D6, G2:G6="6.34 million")))
Level: medium