1. Friends
    "The One with the..." The writers figured they would name them what people were going to call them anyway.
  2. The Big Bang Theory
    Each one sounds like a science experiment. "The Desperation Emanation," and "the Barbarian Sublimation."
  3. 24
    Is the day and time of the episode's time period. "Day 2: 8:00 a.m.- 9:00 a.m."
  4. Sherlock
    Named to reflect the book titles. Like "A Study in Pink" was "A Study in Scarlet."
  5. The Good Wife
    Episodes in season 1 were 1 word long, 2 words in season 2 and so on until season 4 when they started counting back down. Since it ended in season 7 the formula is 1-2-3-4-3-2-1.
  6. Mr. Robot
    Each episode title looks like a file name: "eps1.1_ones-and-zer0es.mpeg," and ""
  7. Gossip Girl
    Movie puns. "Bad News Blair," and "Oh, Brother, Where Bart Thou?"
  8. Community
    Class names. "Introduction to Film," and "Accounting for Lawyers."
  9. Don't Trust the B—— in Apartment 23
    All end in an ellipsis...
  10. The O.C.
    Begins each episode with "the." Not exactly interesting but they were so stubborn about it they named an episode "The My Two Dads."
  11. Chuck
    All Chuck vs____. The Tick did this too.
  12. Breaking Bad
    Used its episode names to give clues about the flash forwards in the second season. ("Seven Thirty-Seven," "Down," "Over," and "ABQ" (which is "737 down over Albuquerque").
  13. Grey's Anatomy
    Song titles. Actually a lot of shows do this: Desperate Housewives, True Blood,Alf, Cougar Town...
  14. 3rd Rock From the Sun
    Almost all have "Dick" in the title. "Dick is from Mars, Sally is from Venus," and "Green-Eyed Dick."
  15. Comedy Bang! Bang!
    Titles after their guest and what he/she is wearing. "Amy Poehler Wears and Black Jacket and Green Pants," and "Michael Cera Wears a Yellow Collared Shirt and White Sneakers."
  16. Empire
    Every episode is named after a Shakespearean quote, or kind of sums one up at least. "The Devil Quotes Scripture," and "Et Tu, Brute?"
  17. That '70s Show
    Starting season 5 they chose a band and named the whole chunk of episodes after a song by that band. I wish they had done this from the beginning when the show was actually good. "Magic Bus," and "We're Not Gonna Take It," are part of the same season.
  18. Unbreakable Kimmy Schmidt
    Always titled "Kimmy (does something)!"
  19. Darkwing Duck
    Most episode names were puns. "Apes of Wrath," and "Extinct Possibility."
  20. Rocky and Bullwinkle
    Had two names each, and two segments per episode, so really it was more like 4 titles for each episode. "The Inspector-Detector Or a Kick in the Plants/Canoes Who? Or Look Before You Leak," and "Fear on the Pier or What's Up, Dock?/TNT for Two or Fright Cargo?"