Table:
0
A
B
C
D
E
F
G
1
#
Title
Directed by
Written by
Original air date
Production code
U.S. viewers (millions)
2
1
"A Love of a Lifetime"
Alex Graves
Kevin Falls
September24,2007
1ANJ79
9.16
3
2
"Friendly Skies"
Alex Graves
Kevin Falls
October1,2007
1ANJ01
8.23
4
3
"Game Three"
Alex Graves
Tom Szentgyorgyi
October8,2007
1ANJ02
6.94
5
4
"The Year of the Rabbit"
Laura Innes
Joan B. Weiss
October15,2007
1ANJ03
6.75
6
5
"The Legend of Dylan McCleen"
Allison Liddi
Matt McGuinness
October22,2007
1ANJ04
6.06
7
6
"Keepers"
Andrew Bernstein
Paul Redford
October29,2007
1ANJ05
5.75
8
7
"Double Down"
Alex Graves
J. R. Orci
November5,2007
1ANJ06
5.13
9
8
"Winterland"
Helen Shaver
Dana Calvo
November12,2007
1ANJ07
6.09
10
9
"Emily"(Part 1)
Frederick King Keller
Juan Carlos Coto
November19,2007
1ANJ08
5.61
11
10
"Blowback"(Part 2)
Karen Gaviola
Kevin Falls
November26,2007
1ANJ09
6.05
12
11
"Home By Another Way"
Lesli Linka Glatter
Tom Szentgyorgyi
December10,2007
1ANJ10
5.28
13
12
"The Hanged Man"(Part 1)
Steven DePaul
Tracy McMillan
December17,2007
1ANJ11
4.24

Questions and formulas:
Question: When did the episode titled "Winterland" air for the first time? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,B1="Winterland"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G13,B2:B13="Winterland"),5))
Level: medium
Question: How many different original air dates did the episode number 6 have? 
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=6))
Formula2: LET(query1,SUMMARIZE(E2:E13,SUMX(A2:A13)),FILTER(query1,CHOOSECOLS(query1,2)=6))
Level: hard
Question: Who wrote the episode with production code 1ANJ01?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,F1="1ANJ01"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G13,F2:F13="1ANJ01"),4))
Level: medium