Richard Trethewey is known for Ask This Old House (2002), This Old House (1979) and This Old House: Trade School (2017).

Richard Trethewey in Ask This Old House (2002)

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The Biggest Movies and TV Coming in September

"The Gentlemen" and "Slow Horses" return this fall, while the "Reacher" spin-off series "Neagley" makes its debut. See our guide of the biggest Fall TV and streaming releases.

2026 Fall TV and Streaming Watch Guide

&quot;The Gentlemen&quot; and &quot;Slow Horses&quot; return this fall, while the &quot;Reacher&quot; spin-off series &quot;Neagley&quot; makes its debut. See our guide of the biggest Fall TV and streaming releases.

Get a closer look at these actors from their many TV and streaming series roles.

Streaming Stars, Then and Now

Richard Trethewey and Kevin O'Connor in This Old House (1979)

Tom Silva, Richard Trethewey, Roger Cook, and Kevin O'Connor in This Old House (1979)

Tom Silva, Richard Trethewey, Roger Cook, and Kevin O'Connor in Ask This Old House (2002)

performer: "When the Saints Go Marching In"

Tom Silva, Richard Trethewey, Roger Cook, Kevin O'Connor, Mauro Henrique, Jenn Nawada Evans, Scott Caron, Mark McCullough, and Ross Trethewey in Ask This Old House (2002)

Tom Silva, Richard Trethewey, Kevin O'Connor, and Jenn Nawada Evans in This Old House (1979)

Norm Abram, Richard Trethewey, Roger Cook, and Kevin O'Connor in This Old House: Trade School (2017)

Norm Abram in The This Old House Hour (2002)

Richard Trethewey(I)

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