Lenore MacKenzie appears in the Season 2 episode of Quantum Leap titled "The Americanization of Machiko" (episode #3). The part of Lenore is played in the episode by K Callan.
About Lenore[]
When Sam leaps into Lenore's son Charlie MacKenzie, who's been stationed for the past four years in Japan during the Korean War, arrives back statside in 1953 in their hometown of Oak Creek, Ohio, with a new Japanese wife, Machiko MacKenzie (Lela Lee Olsen), Al appears moments later to warn Sam that he is there to ensure that Lenore, who was shocked at the appearance of her son with an Oriental wife, accepts Machiko into the family, as she vows to Sam "That woman will never be a part of our family!"
In the original events before Sam's leap into the circumstance, Lenore was never willing to accept Machiko as her daughter in-law, largely because of racial prejudice at the time, which was also the sentiments of some of the other townsfolk, including a one named Rusty, who served in the Pacific Theater in WWII, who acosts Machiko, and drives her to his home, to possibly try to rape her, only for Sam, as Charlie to arrive and the two start fighting and Rusty begins throwing rocks at the two, Sam and Machiko, one of which strikes her in the Mackenzie family truck.
In the hospital, Sam helps Lenore not only come to grips with accepting Machiko, who's still fighting for her life in he hospital room, as well as with the death of her daughter Eileen, Charlie's sister, who faced a similar ostracism from Lenore and gossip of the townspeople because of her becoming pregnant out of wedlock, as she finally accepts her son's marriage to Machiko, and Machiko as well, as she unexpectedly shows up at the wedding of her son and new daughter-in-law at the local church dressed in full Japanese formal attire, in a beautiful kimono.