Tim teaches an auto course at a community college. Going from the young students to hanging out with his older friends, Tim feels his friends are acting old. He starts to hang out with the college students and keep up with their lifestyle.
Tim found the perfect Granite Guy to replace the counters in the Taylor kitchen. When he arrives, Jill recognizes him as the guy who asked her on a date. She does not say anything to Tim - until the Granite Guy makes a pass.
Heidi has marital problems. Tim suggests that Al take Heidi out and talk with her. Heidi confides in Al, and he talks and listens to her. They become good friends. Tim wonders if there is more going on between them. At home, Jill has a cold.
A St Patrick's Day celebration on Tool Time, and the K&B crew is on hand. Meanwhile, Wilson takes a 3-day vacation while his house is fumigated. Willow stays with Tim & Jill, then goes out at night and does not come home. Jill is worried.
Brad joins the school newspaper where Randy is considered a top writer. Brad writes a light-hearted article about sports, and it gets put on the front page - pushing Randy's serious article to a back page. Randy is upset.
Wilson tells Tim his secret that he once saw a spaceship and aliens. Tim tells the others, who then all start to ridicule Wilson. Wilson feels betrayed and stops talking to Tim. Tim finds a way to apologize.
Randy passes his driving test and gets a license. He wants to drive that night to celebrate, but Jill is reluctant because of what happened when Brad drove his first night. Randy does not think this is fair as each of them are different.
One of Binford's tools is chosen to be included on a space shuttle, and Tim asked to also go. Meanwhile, Mark changes from his all black clothing to a well-dressed teenager, then reverts back. Tim has a decision to make.
It's Tim's birthday, and he plans to go to a NASCAR race. However, Jill purchased tickets for the two of them, plus Al, Heidi, and Wilson to go on a river-rafting trip. They go rafting, but Tim reserves a luxury trailer for sleeping.
Randy and his girlfriend Lauren are selected to go to Costa Rica for a school program to study the rain forests. Jill is upset and does not want him to go. Tim tries to fix things by telling Randy he cannot go. Jill is more upset with this.
Jill's sister Carrie stays with the Taylor's while in town for business. Tim's brother Jeff is over for dinner. Carrie and Jeff start seeing each other, and Jill does not think Jeff is good enough for her sister.
Tim and Jill have dinner with Al and Trudy, his girlfriend for one month. Tim and Jill find out Trudy is wealthy. For the one month gift, Trudy gives Al a 1966 Ferrari. Al uncomfortably accepts the gift, but then returns it.
For the first time, the TV ratings for Tool Time show that Al is more popular than Tim. Al decides to start doing promotions and Tim even helps him line up events. Then, Al hires a manager who tries to push too much too fast.
When Tim finds out Marty is separated from his wife and living in the back of Harry's hardware store, Tim invites Marty and his children to stay with him and Jill. Tim turns out to be a great father to Marty's twins. Marty gets jealous.
It's Christmas time, and that means decorating in Tim's neighborhood. Al is excited to decorate his home for the first time, and proves to be competition for Tim. Randy comes home for Christmas and finds things changed since he left.