Table:
0
A
B
C
D
E
F
1
Episode No. Episode No. refers to the episodes number in the overall series, whereas Series No. refers to the episodes number in this particular series.
Series No.
Episode
Director
Writer
Original airdate
2
41
1
"Chain Reaction"
Andrew Morgan
Ginnie Hole
8September1989
3
42
2
"Accidents Happen"
Jeremy Silberston
Bill Gallagher
15September1989
4
43
3
"A Grand in the Hand"
Sue Butterworth
Sam Snape
22September1989
5
44
4
"Day Off"
Steve Goldie
Jacqueline Holborough
29September1989
6
45
5
"Vital Spark"
Terry Iland
John Fletcher
6October1989
7
46
6
"Charity"
Sue Butterworth
Margaret Phelan
13October1989
8
47
7
"Victim of Circumstances"
Andrew Morgan
Ginnie Hole
20October1989
9
48
8
"Deluge"
Steve Goldie
Bill Gallagher
27October1989
10
49
9
"Union"
Gerry Harrison
Jacqueline Holborough
3November1989
11
50
10
"Taking Stock"
Sue Butterworth
Barry Purchese
10November1989
12
51
11
"Banking for Beginners"
Jim Hill
Bryan Elsley
24November1989

Questions and formulas:
Question: What is every episode number for the series number 3?
Formula: SUM(FILTER(A1, B1=3))
Formula2: SUM(FILTER(A2:A12, B2:B12=3))
Level: easy
Question: What is every episode with Barry Purchese as the writer?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="Barry Purchese"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,E2:E12="Barry Purchese"),3))
Level: medium