The BBC has apologised for the leak of Peter Capaldi’s debut as Doctor Who, branding the incident a “damaging mistake”.

The Oscar winner’s highly anticipated debut as the time lord is scheduled for broadcast on August 14, but weeks before the full episode is set to air, a rough edit of the show as well as five scripts and six more episodes from the season were posted on the internet last Monday.

Chief scriptwriter Steven Moffat urged Doctor Who fans to resist the temptation to watch the leaked footage, and now executives at the network have said sorry for the incident.

A statement from the BBC said, “We would like to thank Doctor Who fans everywhere for their amazing efforts in helping us contain the recent leaks.

“The mistake was damaging, and resulted in the exposure of five scripts and the first six unfinished episodes from Series 8 on a publicly accessible site.

“While there is still a risk that this leak will result in more of this content emerging, so far the impact has been contained to a limited amount of this material through a combination of fans’ efforts and the plan that we put in place using new technology and internal manpower to limit any illegal activity.”

The broadcaster thanked the fan site moderators and Doctor Who devotees who had taken action to protect the program.

“BBC Worldwide has taken this issue extremely seriously and disciplinary action has been implemented as a result of the incident,” the statement said.

“Our sincere apologies again to Steven Moffat, the cast and production team who toil long hours to make the show in Cardiff, the BBC, and of course the fans who expect so much better.”

According to BBC.co.uk, the leaked video and scripts are believed to have been stolen from a BBC Worldwide office in the US.