12 Romulan ships
14 Starship Display Cards (12 Romulan, 1 alternative Federation, and 1 alternative Klingon)
10 sub-decks of ten cards each (100 command cards total).
10 System Tiles (6 new ones and 4 that duplicate those from the previous set).
10 new Encounters
25 new Espionage Mission cards
1 updated Mission Deck Console (includes Espionage Missions)
2 Command Posts
3 Away Team Tokens
14 Romulan Cloak Tokens
30 Control Tokens
12 System Tokens
6 Victory Point Tokens
2 Dice
6 Action Tokens
New advanced rules to build upon the base game
Three-player game support to enable play of Federation vs. Klingons vs. Romulans
Some sets also include extra instillation tokens, Klingon cloak tokens, additional Romulan cloak/echo tokens, and extra control tokens