Replacing cracked flagstone; replacing electric stove.

Landscape contractor Roger Cook replaces cracked flagstone with bluestone on a set of front steps. In the ASK THIS OLD HOUSE loft, Roger, host Kevin O'Connor, general contractor Tom Silva and plumbing and heating expert Richard Trethewey ask, "What is it?" Richard makes a HOUSE call to help an avid cook replace her old electric stove with a new gas range.