Table:
0
A
B
C
D
E
1
Episode #
Original airdate (UK)
Episode title
Doctor Who episode
Webcast link
2
S1
26 March 2005
"A New Dimension"
Preview
N/A
3
1
26 March 2005
"Bringing Back the Doctor"
" Rose "
link
4
2
2 April 2005
"The Good, the Bad and the Ugly"
" The End of the World "
link
5
3
9 April 2005
"TARDIS Tales"
" The Unquiet Dead "
link
6
4
16 April 2005
"I Get a Side-Kick Out of You"
" Aliens of London "
link
7
5
23 April 2005
"Why on Earth?"
" World War Three "
link
8
6
30 April 2005
"Dalek"
" Dalek "
link
9
7
7 May 2005
"The Dark Side"
" The Long Game "
link
10
8
14 May 2005
"Time Trouble"
" Father's Day "
link
11
9
21 May 2005
"Special Effects"
" The Empty Child "
link
12
10
28 May 2005
"Weird Science"
" The Doctor Dances "
link
13
11
4 June 2005
"Unsung Heroes and Violent Death"
" Boom Town "
link
14
12
11 June 2005
"The World of Who"
" Bad Wolf "
link
15
13
18 June 2005
"The Last Battle"
" The Parting of the Ways "
link
16
S2
18 June 2005
"The Ultimate Guide"
Episodes 1–12
N/A

Questions and formulas:
Question: How many episodes have the title "the world of who"?
Formula: ROWS(UNIQUE(FILTER(A1, C1="The World of Who")))
Formula2: ROWS(UNIQUE(FILTER(A2:A16, C2:C16="The World of Who")))
Level: medium
Question: What episode number is the episode "bringing back the doctor"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Bringing Back the Doctor"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E16,C2:C16="Bringing Back the Doctor"),1))
Level: medium
Question: What is the episode number for the episode "a new dimension"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="A New Dimension"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E16,C2:C16="A New Dimension"),1))
Level: medium