Tim Allen and Richard Karn Talk Reuniting After 'Home Improvement' for 'Assembly Required' Mónica Marie Zorrilla, provided by Feb. 18, 2021 FacebookTwitterEmail Tim Allen and Richard Karn are reuniting again 30 years after their “Home Improvement” days for the History Channel’s forthcoming unscripted competition series “Assembly Required,” but don’t expect sitcom shenanigans while watching. Instead, the duo will lean into their real-life friendship and tried-and-true on-screen chemistry for a “kind of a live version of ‘Tool Time,'” Allen explained, while spotlighting the best and brightest makers from across the country with a can-do attitude and a competitive streak. During the network’s Television Critics Association winter press tour panel Thursday, star Allen and host Karn gave the rundown on the new hourly 10-episode reality show, joined by the series’ own resident expert April Wilkerson (known best for her DIY woodworking and metalworking videos on YouTube), and Brent Montgomery, executive producer.