TBC 5-man instances

Note, these are normal mode only.  Dungeon sets 3 and 4 drop in normal mode. 

Heroic mode requires level 70, and Revered with the relevant faction in order to get the required key.   All members need the key to enter an instance in Heroic mode.  Epics drop in Heroic mode, as well as these being required for quests leading to attunement to some of the 10/25 man instances.

 Dungeon  Wing Key
Level Quests Reputation  Drops Dungeon set pieces?
Hellfire Citadel,
Hellfire Penninsula
Ramparts No 60-62 Weaken the Ramparts
Honor Hold,
up until Honoured
No
  Blood Furnace
No
61-63
Heart of Rage
The Blood is Life
Honor Hold,
up until Honoured
No
  Shattered Halls
One person in the party needs the key, which is obtained through a quest series
70
Pride of the Fel Horde
Tear of the Earthmother
Turning the Tide
Fel Embers
Honor Hold,
up until Exalted
Yes
Coilfang Reservoir, Zangarmarsh
Slave Pens
No
61-64 Lost in Action
Cenarion Expedition,
up until Honoured
No
  The Underbog
No
62-65
Lost in Action
Bring Me A Shrubbery!
Bring Me Another Shrubbery! (repeatable for Sporeggar reputation)
Oh, It's On
Stalk the Stalker
Cenarion Expedition,
up until Honoured
No
  The Steamvault
No
70
The Warlord's Hideout
The Second and Third Fragments
Orders from Lady Vashj
Cenarion Expedition,
up until Exalted
Yes
Auchindoun, Terokkar Forest
Mana-Tombs
No
64-66
Safety Is Job One
Undercutting the Competition
Someone Else's Hard Work Pays Off
Consortium,
up until Honoured
No
  Auchenai Crypts
No
65-67
Everything Will Be Alright
Lower City,
up until Honoured

No
  Sethekk Halls
No
67-69
Terokk's Legacy
Brother Against Brother
Lower City,
up until Honoured
Yes
  Shadow Labyrinth
One person in the party needs the key, which is obtained from the final boss in Sethekk Halls
70
The Lexicon Demonica
The Codex of Blood
Find Spy To'gun
Lower City,
up until Exalted
Yes
Tempest Keep, Netherstorm
The Mechanar
No, but need flying mount
70
How to Break into the Arcatraz
Fresh From the Mechanar
Sha'tar,
up until Exalted
Yes
  The Botanica
No, but need flying mount 70  How to Break into the Arcatraz
Capturing the Keystone
Master of Potions (Alchemy specialisation quest)
Sha'tar,
up until Exalted
Yes
  The Arcatraz
One person in the party needs the key, which is obtained through a quest series
Also need flying mount
70
Seer Udalo
The Second and Third Fragments
Sha'tar,
up until Exalted
Yes
Caverns of Time,
Tanaris
Escape from Durnholde Keep / Old Hillsbrad Foothills
No, but must complete the quest "The Caverns of Time"
66-68
Old Hillsbrad
Taretha's Diversion
Escape from Durnholde (often this doesn't share properly when started, and must be manually shared before being completed)
Return to Andormu
Keepers of Time,
up until Exalted
No
  Opening the Dark Portal / The Black Morass
No, but must complete all the quests in Escape from Durnholde Keep
68-70
The Black Morass
The Opening of the Dark Portal
Hero of the Brood
Keepers of Time,
up until Exalted
Yes