Buffer Bother is the nineteenth episode ever made in Season 6.
When the Fat Controller comes to inspect the quarry, he discovers Ben is in need of new buffers and sends him to the Works to have them fitted. Bill is jealous and his mind drifts, causing him to knock a pipe into his funnel and cover Mavis with soot. The trucks, sensing that Bill is cross, tease him, making him careless and causing him to reverse into a ditch. Ben, who has just returned, pulls Bill out, when it is discovered that Bill now needs new buffers. Bill later commends Ben on his new buffers and the twins make up their quarrel.
- When the Fat Controller inspects the engines, Ben's buffers are not broken.