User:SOTO/Forum Archive/The Reference Desk/@comment-108.200.138.120-20130622050709/@comment-1398253-20130623164545

User:SOTO/Forum Archive/The Reference Desk/@comment-108.200.138.120-20130622050709/@comment-1398253-20130623164545 They had to do this as Tennant's last five episodes aired after the series 4 boxset was released.