Table:
0
A
B
C
D
E
1
Total No.
Celebrity
Director
Original air date
Viewers
2
1
Shaun Majumder
Scott Harper
11October2007
N/A
3
2
Margot Kidder
Margaret Slaght
18October2007
N/A
4
3
Steven Page
David Langer
25October2007
N/A
5
4
Sonja Smits
Karen Pinker
1November2007
N/A
6
5
Chantal Kreviazuk
Nadine Schwartz
8November2007
N/A
7
6
Major-General Lewis Mackenzie
Richard Martyn
15November2007
N/A
8
7
Mary Walsh
Matt Gallagher
22November2007
N/A
9
8
Randy Bachman
Margaret Slaght
29November2007
N/A
10
9
Scott Thompson
Scott Harper
6December2007
N/A
11
10
Don Cherry
Richard Martyn
10January2008
N/A
12
11
Measha Brueggergosman
Karen Pinker
17January2008
N/A
13
12
Margaret Trudeau
Peter Findlay
24January2008
N/A

Questions and formulas:
Question: If the Original Air Date is 10January2008, what  directors released on that date?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="10January2008"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,D2:D13="10January2008"),3))
Level: medium
Question: The original air date of 29November2007 has what total no.?
Formula: SUMIFS(A1,D1,"29November2007")
Formula2: SUMIFS(A2:A13,D2:D13,"29November2007")
Level: easy
Question: Margot Kidder had what director?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="Margot Kidder"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,B2:B13="Margot Kidder"),3))
Level: medium
Question: How many celebrities had an 18October2007 Original air Date?
Formula: ROWS(UNIQUE(FILTER(B1, D1="18October2007")))
Formula2: ROWS(UNIQUE(FILTER(B2:B13, D2:D13="18October2007")))
Level: medium
Question: Which viewers had Matt Gallagher as the director?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Matt Gallagher"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,C2:C13="Matt Gallagher"),5))
Level: medium