Ask This Old House

Kicking off Ask This Old House's 25th season, Mark McCullough travels to New Mexico to learn the art of adobe, from mixing and forming bricks to repairing a cracked earthen floor. Tom Silva shows Kevin O'Connor an easy trick for cutting miters on imperfect corners. Then, Jenn Nawada revisits a garden she transformed on the show over 10 years ago to see it fully grown in and flourishing.

Heath Eastman upgrades basement lighting by wiring pull-chain fixtures to a wall switch for easier control. Lee Gilliam repairs snowplow lawn damage with a sod patch along a driveway. Then, the team revisits favorite 'What Is It' moments from over the years before guessing a new mystery item: a flat orange plate with spiky feet.

The team looks back at some of their most memorable cutaway demonstrations over the years. Then, Richard Trethewey helps a homeowner add an outdoor hose spigot using PEX. Jenn Nawada visits a farm to learn how they use cover crops to protect and improve their farming soil during the off-season. Then, she demonstrates how a homeowner can use cover crops in vegetable gardens.

Richard Trethewey, Ross Trethewey, and Kevin O'Connor look back at clips to see how thermostats have evolved over the 25 years AskTOH has been on the air. Then, Ross compares common home insulation types, sharing which materials may work best for various situations. Nathan Gilbert helps a homeowner fix a sticking antique front door by replacing the worn hinges, lock hardware, and the door sweep.

Tom Silva uses a water demonstration to explain common gutter mistakes. Ross Trethewey installs a Wi-Fi kit that turns an old mini-split into a smart, app-controlled unit. After, some of the team watches some throwback clips of when their Boston accents came out wicked strong. Then, Mark McCullough removes and re-installs stucco foundation skirting.

The team looks back at how smart home technology has evolved over the 25 years of filming the show, from solar windows to robotic garden tools. Ross Trethewey installs smart privacy film to a bathroom window, allowing it to be clear or frosted with the flip of a switch. Jenn Nawada travels to Santa Fe to help a homeowner select and plant structural, drought-tolerant plants for their landscape.

Mauro Henrique heads to Kansas City to restore a rusty BBQ smoker with high-heat paint. Then Kevin O'Connor, Jenn Nawada, and Lee Gilliam look back at some favorite tree moments from the last 25 years. After, Jenn teaches a homeowner how to pick out a tree from a nursery and plant it.

As part of the show's 25th season celebration, Tom Silva reunites with a Chicago homeowner from season 15 to build a wooden toy truck as a holiday gift, a decade after he helped set up her garage woodshop. Richard Trethewey helps a homeowner prepare to host Thanksgiving by installing a pot filler faucet next to her stove. Then, the team revisits some of their favorite AskTOH holiday moments.