Another round of tape-wiping eliminates more of the recorded history of Doctor Who at the BBC. The instructions to erase the final remaining Hartnell-era episodes go out, as well as an order to get rid of much of Patrick Troughton’s era. Where previous episode wiping sprees may have been sparked by a looming change of video standards, these latest erasures are more likely the result of BBC1’s impending switch from black & white to color after the successful launch of color broadcasting on BBC2 in 1967. The BBC deems non-news-related black & white material commercially unviable with the advent of color TV just around the corner – a decision that Doctor Who fans (and the BBC’s home video department) will regret years later. While many of the Hartnell episodes are recoverable from foreign markets at a later date, much of the Troughton era is lost forever – mere weeks after initial broadcast.