Table:
0
A
B
C
D
E
1
Series Sorted
Title
Doctor
Featuring
Released
2
6EB/A
The Elite
5th
Tegan , Nyssa , Dalek
October 2011
3
6EB/B
Hexagora
5th
Tegan, Nyssa
November 2011
4
6EB/C
The Children of Seth
5th
Tegan, Nyssa
December 2011
5
6Y/AI
The Guardians of Prophecy
6th
Peri
May 2012
6
6Y/AJ
Power Play
6th
Peri, Victoria
June 2012
7
6Y/AK
The First Sontarans
6th
Peri, Sontarans , Rutans
July 2012
8
H/C
The Masters of Luxor
1st
Susan Foreman, Ian Chesterton, Barbara Wright
August 2012
9
XX/A
The Rosemariners
2nd
Jamie McCrimmon, Zoe Heriot
September 2012

Questions and formulas:
Question: what is the released when the series is sorted 6y/ai?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="6y/ai"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,A2:A9="6y/ai"),5))
Level: medium
Question: who is the featuring when the doctor is the 6th and the series sorted is 6y/ak?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="6th")*(A1="6y/ak")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,(C2:C9="6th")*(A2:A9="6y/ak")),4))
Level: medium
Question: what is the series sorted when the released is may 2012?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="may 2012"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,E2:E9="may 2012"),1))
Level: medium
Question: who is the featuring when the series sorted is 6eb/b?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="6eb/b"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,A2:A9="6eb/b"),4))
Level: medium