For the only time - probably to mark the final episode - the credits roll over the final scene and the credit for each actor appears over a shot of them; the camera then pulls away and the credits for the crew roll over shots of them shooting the scene.
The copy of the Daily Mirror that Pete can be seen reading is from Friday 3rd April 1981 - the same day this episode was broadcast.
Perhaps to reflect that it was the last-ever episode, this was the only one across the two series which featured every regular cast member.