Richard Trethewey helps a homeowner replace a broken cast-iron closet flange for a toilet. He installed a replacement cast-iron closet flange that uses a compression connection. Roger, Kevin O'Connor, Tom Silva, and Richard examine an unfamiliar object and try to guess how it is used. Afterward, Tom and a homeowner repair a cracked plaster wall using a new type of adhesive system. Back in the loft, Roger shares a tip sent in by viewer on digging holes, which described an easy way to measure the depth of a hole while using a clam-shell type post-hole digger by marking the length of the handle of the digger to measure the depth of the hole easily.