Table:
0
A
B
C
D
E
1
Episode
First broadcast
Rufus guest
Marcus guest
Winner
2
2x01
23 March 2009
Chris Addison
Dara Ó Briain
Red (3–2)
3
2x02
30 March 2009
Mark Watson
Ardal O'Hanlon
Red (2–2)
4
2x03
6 April 2009
Jo Caulfield
Katy Brand
Red (3–2)
5
2x05
27 April 2009
Reginald D. Hunter
Sean Hughes
Blue (3–2)
6
2x06
4 May 2009
Frankie Boyle
Lucy Porter
Blue (3–2)
7
2x07
13 October 2009
Andrew Maxwell
Frankie Boyle
Blue (3–1)
8
2x08
20 October 2009
Sean Lock
Phill Jupitus
Blue (3–1)
9
2x09
27 October 2009
Dara Ó Briain
Will Smith
Blue (4–1)
10
2x10
3 November 2009
Simon Day
Charlie Higson
Blue (5–0)
11
2x11
10 November 2009
Rory McGrath
Sean Hughes
Blue (3–1)
12
2x12
17 November 2009
Hugh Dennis
Mark Watson
Red (3–2)
13
2x13
24 November 2009
Clips Show: Episodes 1–6
Clips Show: Episodes 1–6
N/A

Questions and formulas:
Question: When was episode 2x11 aired for the first time?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="2x11"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,A2:A13="2x11"),2))
Level: medium
Question: Who won the episode in which Sean Lock was Rufus's guest?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Sean Lock"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,C2:C13="Sean Lock"),5))
Level: medium
Question: When was the episode 2x10 aired for the first time?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="2x10"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,A2:A13="2x10"),2))
Level: medium
Question: Who was Marcus's guest in the episode when Rufus's guest was Rory McGrath?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Rory McGrath"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,C2:C13="Rory McGrath"),4))
Level: medium