Table:
0
A
B
C
D
E
F
G
H
1
No.
#
Title
Directed by
Written by
U.S. viewers (million)
Rank (week)
Original air date
2
72
2
" The Right Stuff "
Deran Sarafian
Doris Egan & Leonard Dick
17.44
6
October2,2007
3
73
3
" 97 Seconds "
David Platt
Russel Friend & Garrett Lerner
18.03
5
October9,2007
4
74
4
" Guardian Angels "
Deran Sarafian
David Hoselton
18.10
5
October23,2007
5
75
5
" Mirror Mirror "
David Platt
David Foster
17.29
7
October30,2007
6
77
7
" Ugly "
David Straiton
Sean Whitesell
16.95
6
November13,2007
7
78
8
" You Don't Want to Know "
Lesli Linka Glatter
Sara Hess
16.88
6
November20,2007
8
79
9
" Games "
Deran Sarafian
Eli Attie
16.96
7
November27,2007
9
80
10
" It's a Wonderful Lie "
Matt Shakman
Pamela Davis
22.56
6
January29,2008
10
81
11
" Frozen "
David Straiton
Liz Friedman
29.04
3
February3,2008
11
82
12
" Don't Ever Change "
Deran Sarafian
Doris Egan & Leonard Dick
23.15
3
February5,2008
12
83
13
" No More Mr. Nice Guy "
Deran Sarafian
David Hoselton & David Shore
14.51
N/A
April28,2008

Questions and formulas:
Question: When is the original air date written by sean whitesell?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,E1="Sean Whitesell"),8))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H12,E2:E12="Sean Whitesell"),8))
Level: medium
Question: Who is no. 79 directed by?
Formula: LET(query1,SUMMARIZE(D1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=79))
Formula2: LET(query1,SUMMARIZE(D2:D12,SUMX(A2:A12)),FILTER(query1,CHOOSECOLS(query1,2)=79))
Level: hard
Question: What is the # when u.s. viewers  (million) is 17.44?
Formula: SUM(FILTER(B1, F1=17.44))
Formula2: SUM(FILTER(B2:B12, F2:F12=17.44))
Level: easy
Question: How many # were written by david hoselton?
Formula: SUMIFS(B1,E1,"David Hoselton")
Formula2: SUMIFS(B2:B12,E2:E12,"David Hoselton")
Level: easy