Table:
0
A
B
C
D
E
F
1
Date
Episode
Performer 1
Performer 2
Performer 3
Performer 4
2
2 January 1988
1
John Sessions
Stephen Fry
Dawn French
Lenny Henry
3
9 January 1988
2
John Sessions
Stephen Fry
Hugh Laurie
Enn Reitel
4
16 January 1988
3
John Sessions
Stephen Fry
Nonny Williams
Jimmy Mulville
5
23 January 1988
4
John Sessions
Stephen Fry
Kate Robbins
Griff Rhys Jones
6
30 January 1988
5
John Sessions
Stephen Fry
Jimmy Mulville
John Bird

Questions and formulas:
Question: Who is the second performer in episode 5?
Formula: LET(query1,SUMMARIZE(D1,SUMX(B1)),FILTER(query1,CHOOSECOLS(query1,2)=5))
Formula2: LET(query1,SUMMARIZE(D2:D6,SUMX(B2:B6)),FILTER(query1,CHOOSECOLS(query1,2)=5))
Level: hard
Question: How many times was performer 3 Kate Robbins?
Formula: ROWS(UNIQUE(FILTER(A1, E1="Kate Robbins")))
Formula2: ROWS(UNIQUE(FILTER(A2:A6, E2:E6="Kate Robbins")))
Level: medium
Question: Who was perfomer one on 30 January 1988?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="30 January 1988"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,A2:A6="30 January 1988"),3))
Level: medium
Question: Who was performer 4 when Kate Robbins was performer 3?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="Kate Robbins"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,E2:E6="Kate Robbins"),6))
Level: medium
Question: How many episodes was Jimmy Mulville performer 4?
Formula: SUMIFS(B1,F1,"Jimmy Mulville")
Formula2: SUMIFS(B2:B6,F2:F6,"Jimmy Mulville")
Level: easy