Table:
0
A
B
C
D
E
1
Season
Premiere
Finale
Rank
Rating
2
1
September 22, 1976
May 4, 1977
#3
26.0
3
2
September 14, 1977
May 10, 1978
#4 (tie)
24.4
4
3
September 13, 1978
May 16, 1979
#9
24.9
5
4
September 12, 1979
May 7, 1980
#20 (tie)
20.9
6
5
November 30, 1980
June 24, 1981
#59
N/A

Questions and formulas:
Question: What is the rank for the episode that premiered on September 12, 1979?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="september 12, 1979"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="september 12, 1979"),4))
Level: medium
Question: What was the date of the finale for the season that premiered on September 22, 1976?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="september 22, 1976"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="september 22, 1976"),3))
Level: medium
Question: What is the rank for the episode that premiered on September 13, 1978?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="september 13, 1978"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="september 13, 1978"),4))
Level: medium
Question: What was the date of the finale for Season 3?
Formula: LET(query1,SUMMARIZE(C1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=3))
Formula2: LET(query1,SUMMARIZE(C2:C6,SUMX(A2:A6)),FILTER(query1,CHOOSECOLS(query1,2)=3))
Level: hard
Question: What was the date of the premiere that had a 20.9 rating?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1=20.9),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,E2:E6=20.9),2))
Level: medium