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YesterdayLand

Channel Surfing

by Yar Woo, Jan Chong
Answer: VACUUM TUBE

The first step in the puzzle is to identify the names of the episodes depicted in the TVs shown. The asterisks match the number of words in the episode titles; extract the green asterisk.

First row:
that's too MUCH, man (Bojack Horseman)
ROBIN 101 (How I Met Your Mother)
boy-scoutz in the HOOD (The Simpsons)

Second row:
CHEF'S salty chocolate balls (South Park)
selma's CHOICE (The Simpsons)
returning JAPANESE (King of the Hill)

Third row:
the ALLIANCE (The Office)
ARMY of ghosts (Doctor Who)
ricksy BUSINESS (Rick and Morty)

Fourth row:
the ENGLISH patient (Seinfeld)
royal PUDDING (South Park)
child abduction is not FUNNY (South Park)
by any other NAME (Star Trek)

Fifth row:
BOOK of the stranger (Game of Thrones)
a deep-FRIED korean thanksgiving (Gilmore Girls)
our MAN bashir (Star Trek: DS9)
the big red chicken's magic WAND (Dora the Explorer)

Sixth row:
operation righteous COWBOY lightning (30 Rock)
VIDEO makers (Adventure Time)
the GAME (Star Trek: TNG)

Seventh row:
high ANXIETY (King of the Hill)
when aliens ATTACK (Futurama)
homer vs. the 18TH amendment (The Simpsons)

Eighth row:
bart gets HIT by a car (The Simpsons)
the KNACK (Dilbert)

Ninth row:
leslie vs. APRIL (Parks and Recreation)
ghoul FOOLS (SpongeBob SquarePants)
server ERROR (Silicon Valley)
CODE of honor (Star Trek: TNG)

Tenth row:
FAVORITE son (Star Trek: Voyager)
monkey see DOGGIE do (Powerpuff Girls)
frank falls out the WINDOW (It's Always Sunny in Philadelphia)

Now we have ten crossword-style clues with enumerations:

Much, in Robin Hood → THE MILLER'S SON
Chef's choice, in Japanese → OMAKASE
Alliance between army and business → MILITARY-INDUSTRIAL COMPLEX
English pudding with funny name → SPOTTED DICK
Book by Friedman and Wand → ESSENTIALS OF PROGRAMMING LANGUAGES
Cowboy video game → RED DEAD REDEMPTION
Anxiety attack after the 18th one → 19TH NERVOUS BREAKDOWN
Hit by the Knack → MY SHARONA
April Fools error code → 418 I'M A TEAPOT
Favorite doggie in the window → THE ONE WITH THE WAGGLY TAIL

All of these answers sound like, and fit, the episode naming convention of well known TV shows (sometimes just for one season):

THE MILLER'S SON → Desperate Housewives (most of the titles reference Sondheim songs or lyrics)
OMAKASE → Hannibal (season 2; titles are words relating to Japanese cuisine)
MILITARY-INDUSTRIAL COMPLEX → Orphan Black (season 3; all titles are phrases from Eisenhower's farewell address)
SPOTTED DICK → 3rd Rock from the Sun (most titles have the word "Dick" in them)
ESSENTIALS OF PROGRAMMING LANGUAGES → Community (titles sound like college courses)
RED DEAD REDEMPTION → The Mentalist (titles reference the word 'red')
19TH NERVOUS BREAKDOWN → That 70s Show (season 7; titles are Rolling Stones songs)
MY SHARONA → Scrubs (titles start with 'my')
418 I'M A TEAPOT → Mr. Robot (season 4; titles are HTTP 4xx error codes)
THE ONE WITH THE WAGGLY TAIL → Friends (titles start with 'The One...')

Indexing into the shows by the channel number gives the answer, VACUUM TUBE.