It sounds like you might be looking for information regarding , but the phrase "helpful piece" is a bit ambiguous in this context.
A breakdown or review of the "Two Terrible Ladies" episode or the "Sherlock Holmes" arc? LUPIN III: PART 6 (Dub)
To make sure I give you exactly what you need, could you clarify if you are looking for: It sounds like you might be looking for
Where or when to watch the English dubbed version (it has previously aired on blocks like Toonami )? The Anime Series "One Piece": LUPIN III: PART 6 (Dub)