William Shatner

Kirk

Leonard Nimoy

Spock

DeForest Kelley

McCoy

James Doohan

Scotty

Walter Koenig

Chekov

Nichelle Nichols

Uhuru

George Takei

Sulu

Mark Lenard

Sarek

David Warner

Chancellor Gorkon

Kim Cattrall

Lt. Valeris

Rosanna DeSoto

Azetbur

Christopher Plummer

Chang

Kurtwood Smith

Federation President

Brock Peters

Admiral Cartwright

Paul Rossilli

Kerla

John Schuck

Klingon Ambassador

Iman

Martia

Leon Russom

Chief In Command

Michael Dorn

Klingon Defense Attorney

Grace Lee Whitney

Excelsior Communications Officer

Robert Easton

Klingon Judge

Clifford Shegog

Klingon Officer

William Morgan Sheppard

Klingon Commander

Brett Porter

General Stex

Jeremy Roberts

Excelsior Officer

Michael Bofshever

Excelsior Engineer

Angelo Tiffe

Excelsior Navigator

Boris Lee Krutonog

Helmsman Lojur

Christian Slater

Excelsior Communications Officer

Tom Morga

The Brute

Todd Bryant

Klingon Translator

John Bloom

Behemoth Alien

Jim Boeke

First Klingon General

Carlos Augusto Cestero

Munitions Man

Edward Clements

Young Crewman

Katie Johnston

Martia as a Child

Doug Engalla

Prisoner at Rura Penthe

Matthias Hues

Second Klingon General

Darryl Henriques

Nanclus

David Orange

Sleepy Klingon

Judy Levitt

Military Aide

Shakti Chen

ADC

Michael Snyder

Crewman Dax

René Auberjonois

Colonel West (uncredited)

Denise Lynne Roberts

Enterprise-A Crewmember (uncredited)