Ask This Old House Show Summary, Upcoming Episodes and TV Guide

Watch as Mark installs precast concrete steps, Mauro paints a table, and Heath installs a new lamppost.

Richard replaces a weird shower valve with a conventional pressure balanced one; Mauro repaints a radiator cover with lead paint on it; Tom explains how to identify and remove load-bearing walls.

In this episode, Master Electrician Heath Eastman installs landscape lights in a garden and Richard Trethewey explains how siphons work. Then, Tom Silva organizes tools with pegboard, and Mark McCullough helps a homeowner redo his walkway.

Jenn Nawada discusses Christmas trees; Richard Trethewey explains what can and can't go down a garbage disposal after holiday dinners; Heath Eastman helps a homeowner safely install a variety of Christmas lights.

In this special episode, we'll share some of the features we've added to homeowners' houses over the years and we'll break down the process of adding one of these to your own backyard.

Jenn Nawada explains how various climates across the United States impact the design, care, and maintenance of different landscapes, which includes discussing USDA Hardiness Zones and native plant species.

In this episode, Richard and Ross Trethewey explain why, when, where, and how to prevent major plumbing failures.

Tom learns how to create a unique keepsake box from island materials in Build It. Richard looks at a new way to store solar energy. Roger helps a family grow an organic garden.

Tom and Kevin create a planter box in Build It. Ross Trethewey features a tablet attachment that makes 3D scans of home interiors in Future House. Scott explains the need for surge protection.

Scott heads to Alaska to hook up a portable generator powering an entire house. Tom repairs a poorly installed piece of wood floor nosing. Richard gives an inside look at dishwasher cycles.

Richard describes the dangers of CO2. Tom and Kevin build a home message center. The guys ask 'What Is It?' Scott replaces track lighting. Jenn walks through inspiration for a landscape design.

Tom installs a door knob passage set on a closet. Richard gives a history lesson about plumbing and shows off new toilet technology. Jenn uses a historic design as inspiration to revive a backyard.

Tom and Kevin use scrap to create an end grain cutting board. Scott installs surface-mounted downlights. The guys ask, 'What is it?' And Roger discusses the best ways to keep mice out of your house.

Kevin heads to LA to meet up with Nick Offerman. Ross Trethewey looks at a new device to track home energy usage. And Richard shows what happens when you use the wrong soap in the dishwasher.

Jenn shares an environmentally safe way to keep walkways safe. Tom gives a tutorial on hand saws. Richard diagnoses a hot water radiator problem. The guys ask 'What is it?' Scott installs LED lights.

Tom heads to Chicago to transform a one-car garage into a carpentry workshop. Scott installs a wireless light switch. Richard gives a history lesson on antique bath fixtures.

Richard travels to Seattle to help a couple choose and install laundry appliances. Tom shows Kevin new table saw technology. And Scott repairs a three-way switch.

Richard learns about a way to heat and cool a house using a new room-by-room ventilation system. The guys ask, 'What is it?' And Tom explains the best ways to patch a small hole in the wall.

Roger helps plant a home orchard using apple and pear trees. Tom shows Kevin how to choose and use a circular saw. Richard installs a new tank water heater and discusses new regulations on them.

Kevin visits Chicago to explore the dangers of home fires and ways to stay safe. Scott shows off a portable generator that doesn't run on gas. The guys ask, 'What is it?' And Richard finds a rusted sink strainer in the kitchen.

Building a home gym for a wounded U.S. Navy SEAL; repairing a faulty doorbell.

Repairing an antique door; growing edible herbs indoors; disappearing toilet water.

Growing potatoes in Idaho; Jim Cantore talks about weather stations; installing track lighting.

Installing a light fixture; installing a bathtub overflow drain; insulation R-value.

Replacing a front door deadbolt with a lock that uses Bluetooth; installing a weather-resistant television on a patio.

An electrical solution to ice dams; meteorologist Jim Cantore; snowblower maintenance; tuning up the furnace.

Using a chainsaw; improving the electrical connection to a garage; silencing squeaky floors in a baby's room.

Richard installs a smart thermostat. Ross Trethewey shows Kevin a solar install. Kevin, along with Tom, Richard and Roger ask, 'What Is It?'

Roger helps a homeowner plant an indoor tropical garden with plants from Jamaica. Richard, Roger, Kevin and Tom ask 'What Is It?' Richard shows how to change the temperature on water heaters. Then Tom and Kevin build an American flag out of reclaimed wood.

Roger helps a homeowner replace a mailbox that was damaged by a snowplow. Kevin shares some information about window anatomy. Tom helps a homeowner reuse an old door in a new opening. And the guys ask, 'What Is It?'

Kevin and Roger meet with Meteorologist Jim Cantore to discuss lightning. Roger sees a lightning protection system installed. Richard installs a reverse osmosis filter for drinking water. And the guys ask, 'What Is It?'

Tom and Kevin build a basic entry shelf from poplar and plywood. Scott Caron helps a homeowner wire a basement room for outlets and lighting. Then, Kevin, along with Roger, Richard, and Tom ask 'What Is It?'

Kevin helps a homeowner transform an old backsplash. Then, the guys ask 'What Is It?' Afterward, Richard helps a homeowner install a new kitchen faucet.

Roger removes overgrown shrubs from the front yard and replaces them with an edible landscape. Richard shares tips on snaking drains and Tom helps a homeowner replace damaged pieces of vinyl siding. The guys ask, 'What Is It?'

Tom and Kevin build a watertight fire pit cover. Scott teaches Kevin about the evolution of fuses. Richard upgrades and vents a bathroom sink. The guys ask 'What Is It?'

Scott Caron connects a homeowner's basement lighting system to one switch. Richard shares some tips on air conditioning maintenance. The guys ask 'What Is It?' Roger shows a homeowner how to rejuvenate a crabapple tree.

Roger follows up with a beekeeper regarding honey harvesting. Kevin, along with Roger, Richard, and Tom ask 'What Is It?' Scott Caron adds outlets to a homeowner's home.

Richard samples some unique barbeque, and installs a natural gas line for a new grill. Kevin, along with Roger, Richard, and Tom ask 'What Is It?' Roger shares some tips on what grows best in the shade. Tom hangs a heavy, decorative mirror on a masonry chimney.

The guys tackle practical solutions for drought. Kevin and Richard tour Lake Mead. Roger replaces a water-guzzling lawn. Kevin meets with Meteorologist Jim Cantore to hear cautionary tales from the front lines of the drought. Richard replaces an old-fashioned toilet.

Roger heads to Florida to learn about citrus greening, a disease that's killing citrus trees across the state; The guys ask What Is It?; Tom replaces an old vinyl peel-and-stick floor with ceramic tile.

Kevin helps make a home accessible for a homeowner in a wheelchair by modifying a bathroom and several different sets of stairs. Tom and Kevin rebuild a dangerous staircase for a survivor of the Boston Marathon bombing.

Roger repairs a drip irrigation system The guys ask 'What is it?' Richard and tile expert Joe Ferrante help repair a leaky bathtub once and for all.