This is the first time in Star Trek that Walter Koenig has played a character other than Pavel Chekov.
Walter Koenig played Pavel Chekov in Star Trek (1966), and reprised the role in Star Trek: The Motion Picture (1979), Star Trek II: The Wrath of Khan (1982), Star Trek III: The Search for Spock (1984), Star Trek IV: The Voyage Home (1986), Star Trek V: The Final Frontier (1989), Star Trek VI: The Undiscovered Country (1991), and Star Trek: Generations (1994).