Archie Andrews; Veronica Lodge; Reggie Mantle; Mr. Lodge; Chip (a boat mechanic)
Mr. Lodge has Archie take a borrowed boat back to the mechanic and exchange it for Mr. Lodge's boat, which was being repaired. But Archie isn't sure about the boats' controls and ends up causing more damage.
Archie Andrews; Professor Flutesnoot; Mr. Weatherbee; Mr. Johnson (the janitor); Miss Grundy
Archie accidently drops a beaker of acid that eats through the chemistry floor. Banned from the chem lab, Mr. Weatherbee asks Archie to polish his chair and desk. But Archie accidently adds a small test tube of acid into the varnish, which eats away the varnish brushes as well as the legs of Mr. Weatherbee's desk.
Archie Andrews; Mr. Lodge; Veronica Lodge; Harris (a neighbor of the Lodges)
Archie picks some of Mr. Lodge's prize roses as a gift to Veronica. To make up for the blunder, Archie then digs up one of the Lodges' neighbor's rose bushes and gives it to Mr. Lodge as a replacement.