Season: 1
Original Airdate:December 15, 1966
Writer(s): Paul Schneider
Director(s):Vincent McEveety
Guest Stars
Mark Lenard as Romulan Commander
Lawrence Montaigne as Decius
Paul Comi as Lt. Stiles
John Warburton as Centurion
Stephen Mines as Lt. Robert Tomlinson
Barbara Baldavin as Lt. Angela Martine
Garry Walberg as Hansen
John Arndt as Fields
Robert Chadwick as Romulan Scanner Operator
Stardate: 1709.2
Synopsis: Kirk outwits a Romulan commander in a “chess-like” space battle.