Season Two: Ancient Enemies

 was released on July 27th 2010.

Raised level cap
Players have access to the following new levels and associated ranks:
 * Federation
 * Rear Admiral, Lower Half (level 41-45)
 * Rear Admiral, Upper Half (level 46-50)
 * Vice Admiral (level 51)
 * Klingons
 * Brigadier General (level 41-45)
 * Major General (level 46-50)
 * Lieutenant General (level 51)

Tier 5 ships
The following new Ships have been added for level 51 players:
 * Federation
 * Exploration Cruiser Retrofit
 * Tactical Escort Retrofit
 * Long Range Science Vessel Retrofit
 * Klingons
 * Kar'Fi Carrier

Items
The update introduces Mark XI and Mark XII items for level 51 players.

New missions
The following new missions have been added:
 * Federation and Klingon
 * Undine Front
 * Federation
 * Diplomacy
 * Klingons
 * Klingon Sector
 * Fek'Ihri Front
 * Diplomacy
 * Klingons
 * Klingon Sector
 * Fek'Ihri Front
 * Klingons
 * Klingon Sector
 * Fek'Ihri Front
 * Klingons
 * Klingon Sector
 * Fek'Ihri Front
 * Klingon Sector
 * Fek'Ihri Front
 * Fek'Ihri Front
 * Fek'Ihri Front
 * Fek'Ihri Front
 * Fek'Ihri Front

Federation Diplomatic Corps
Four diplomatic ranks are introduced, that grant special privileges for players who take part in diplomacy missions.

Fluidic space
Players can now enter Fluidic space by playing the Undine Front campaign, a new Fleet action and Enemy Signal Contacts (more commonly known as Deep Space Encounters).

Ship interiors

 * Ready room, crew and engineering decks added and accessible from turbolift
 * Includes room for trophies

Mini games
The update introduces the Waveform Modulation and Dabo mini-game.

Weekly feature episodes
Season Two saw the launch of weekly Feature Episode mission arcs. The first series focused on a conflict between the Deferi and the Breen.

Customization
New customization options include
 * Fleet emblems
 * Improved and new costume options for Klingons

Test weekend
Season Two was first released on Tribble 7 July 2010. Cryptic held a Tribble Test Weekend from 23 to 26 July 2010 prior to the release of Season Two. Players who participated received the Fluidic Space Tribble as a reward.