Serial Conventions (Solution)

Each of the eight subpuzzles clue a list of episodes from a TV show, in which the episodes have some thematic naming convention. Taking the series episode numbers as A=1, B=2, etc. yields a word for each subpuzzle.

Part 1: Community

Romantic Expressionism	15	O
Spanish 101	2	B
Beginner Pottery	19	S
Introduction to Film	3	C
Contemporary American Poultry	21	U
Basic Genealogy	18	R
Pilot	1	A

Part 1's answer is OBSCURA.

Part 2: Bones

The Woman in Limbo	22	V
Two Bodies in the Lab	15	O
The Man with the Bone	18	R
The Graft in the Girl	20	T
A Boy in a Bush	5	E
Mother and Child in the Bay	24	X

Part 2's answer is VORTEX.

Part 3: The Blacklist

No. 57	15	O
No. 145	2	B
Nos. 119-122	19	S
No. 84	3	C
No. 8	21	U
No. 135	18	R
No. 52	1	A

Part 3's answer is OBSCURA.

Part 4: The L Word

Lies, Lies, Lies	4	D
Labyrinth	18	R
Lap Dance	15	O
Life, Loss, Leaving	14	N
Lawfully	5	E

Note that each individual L word is given separately, solvers must combine them to form the episode names. Part 4's answer is DRONE.

Part 5: Monk

Mr. Monk Goes Back to School	14	N
Mr. Monk and the Marathon Man	9	I
Mr. Monk and the Psychic	3	C
Mr. Monk Goes to Mexico	15	O
Mr. Monk Meets Dale the Whale	4	D
Mr. Monk Goes to the Carnival	5	E
Mr. Monk and the Airplane	13	M
Mr. Monk Meets the Playboy	21	U
Mr. Monk Goes to the Theater	19	S

Part 5's answer is NICODEMUS.

Part 6: Friends

The One Where the Monkey Gets Away	19	S
The One with the Evil Orthodontist	20	T
The One with All the Poker	18	R
The Pilot	1	A
The One with Ross's New Girlfriend	25	Y

Part 6's answer is STRAY.

Part 7: 24

2am-3am	3	C
2pm-3pm	15	O
2pm-3pm	15	O
11am-12pm	12	L

Part 7's answer is COOL.

Part 8: The Big Bang Theory

The Fuzzy Boots Corollary	3	C
The Bad Fish Paradigm	18	R
The Griffin Equivalency	21	U
The Codpiece Topology	19	S
The Grasshopper Experiment	8	H

Part 8's answer is CRUSH.

Final Answer: Smallville

All of the subpuzzle's answers are the names of Smallville episodes, whose names are all one word. Taking the episode numbers as letters again gives the final answer, TV TROPES.