Table:
0
A
B
C
D
E
1
Character
Actor
First Episode
Final Episode
Episode Count
2
Kyle Harmon
Evan Ellingson
"Dangerous Son"
"Dishonor"
018
3
Marisol Delko Caine
Alana de la Garza
"Nailed"
"Countermeasures"
012
4
Julia Winston
Elizabeth Berkley
"Raising Caine"
"Dissolved"
009
5
Ray Caine, Jr.
Alex Buck
"Grave Young Men"
"Rio"
007
6
Kenwall Duquesne
John Heard
"Double Cap"
"Recoil"
004
7
Ray Caine, Sr.
Dean Winters
"10-7"
"Rio"
004
8
Susie Keaton
Azura Skye
"Freaks and Tweaks"
"Nothing to Lose"
004
9
Nick Townsend
Rob Estes
"If Looks Could Kill"
"Internal Affairs"
004

Questions and formulas:
Question: What was the last episode featuring Rob Estes?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="rob estes"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,B2:B9="rob estes"),4))
Level: medium