Bob has a new personal organizer, which has details of all his jobs for the day. However, as soon as Wendy sets off to build a garden wall, the screen goes blank. Rather than admit that it is broken, Bob ties knots in his handkerchief to remind him of his jobs - put up a new bin, clear Mrs. Broadbent's guttering... or is it Mrs. Potts'? He finds one knot there already, but can't remember what it is for. Meanwhile, Wendy is having problems with the wall, due to some well-meaning interference from Mr. Beasley. Bob clears Mrs. Potts' gutter, but should have been fixing her garden gnome. He goes on to sort out Mrs. Broadbent's guttering, but the drainpipe is still blocked. As Bob tries to clear it, a load of grunge shoots over his face. Back at the yard, Wendy helps him clean up and finds a knot tied in his hanky. Bob admits that the organizer wouldn't work - and Wendy reveals that the first knot was to remind him that it needed new batteries.