On May 11, 2012, ABC renewed Last Man Standing for a second season. Beginning this season, Amanda Fuller now plays Kristin, replacing Alexandra Krosney. Flynn Morrison was also added to the main cast as an age - advanced Boyd, replacing twins Evan and Luke Kruntchev. Jordan Masterson recurs as Ryan, Boyd 's father, replacing Nick Jonas, who guest starred in one episode in the previous season. The second season initially received a thirteen - episode order, but ABC announced on November 12, 2012 that an additional three scripts had been ordered. The episode order was then extended to five additional episodes, bringing the current total to eighteen for the season. Tim Allen 's former Home Improvement co-star Richard Karn guest starred in the episode "Attractive Architect '', playing the character Bill McKendree. Karn reprised his role again in the episode "The Fight ''. Jonathan Taylor Thomas, another Home Improvement co-star of Allen 's, guest starred in the season finale, "College Girl '', as the character John Baker.
who was the first boyd on last man standing
twins Evan and Luke Kruntchev