They are set to appear in the 50th anniversary special.

In the show's special anniversary on February 7, 2010, a new set was introduced.

The final episode of the season, broadcast on 1 June 2012, was a 50th anniversary special.

A handful of special 35th Anniversary 1989 models may have a slight value edge.

I'll have to give it some thought to come up with a really special one-year anniversary.

Indeed, the October issue is a 60th anniversary special.

It was announced that they would reappear as part of the 50th Anniversary special in 2013.

I am delighted to be with you as your Queen to celebrate this special anniversary.

It was my twenty-fifth birthday, which is a special anniversary.

On May 18, 2006, the hundredth episode was shown with a big anniversary special.