In the original series Stephen Talbot played Beavers Middle school best friend Gilbert Bates. Stephen was approached numerous times to appear in The New Leave it to Beaver but declined.
The show was a billion dollar project which ran for 100 episodes but only aired once on TV. They had full intent on continuing it, but the studio lost the show in its entirety.
At the conclusion of the tv movie prequel Still the Beaver, Wally and Mary Ellen had a baby boy named Ward. In the series, they have a young girl named Kelly.