Arrested Development has several layers - the overall plot is about the head of a development company who's been arrested, the characters themselves are in various states of arrested development, and (initially at least) the company's development work is pretty much on hold ("arrested," one might say), because of the arrests.
Almost all the episode titles are pun-based, eg. "Key Decisions", "Pier Pressure", "Marta Complex", "Shock and Aww".
Blind Justice- a reference to the principle of objectivity in law and the incredibly hard to guess disability of the lead character, Det. Jim Dunbar.
The fourth Blackadder series is called - what else? - Blackadder Goes Forth.
Several LOST episodes have pun-based titles, such as "Lockdown," which features John Locke pinned under a blast door. Michael Giacchino's score is riddled with groan-worthy puns, such as "Thinking Clairely," "Keamy Away From Him," and many, many more.
The Australian TV series Packed to the Rafters is about the Rafter family, whose house is "packed" (after all the parents' adult children moved back in with them).
Some 90% of Corner Gas episodes are titled with puns combining two or more of the episode's storylines. (I.e. "American Resolution", which focuses on New Year's resolutions and a character fighting a perceived American identity.)
The Not-Pictionary-honest game show Win, Lose or Draw. The Gaelic-language version was given the Completely Different TitleDe Tha Seo ("What's This?")
Titles of Hannah Montana episodes (usually) contain puns on the titles of popular songs ("You Are So Sue-able To Me"; "I Want You To Want Me...To Go To Florida")
Sonny With A Chance is a pun on a weather report ("sunny with a chance of rain") and the title character Sonny Munroe having a chance to succeed in Hollywood.
The Breaking Bad episode "Face Off," in which the season antagonist literally gets his face blown off.
The How I Met Your Mother episode "The Broken Code", which refers to how Ted supposedly broke The Bro Code by holding hands with Robin (who was engaged to Barney at this point of the series).
The Moone Boys episode "Godfellas" is about altar boys (the "God" part) who act like gangsters (a la Goodfellas). Futurama had previously used the exact same pun for an episode that had much to do with God but not much with gangsters.