Giles from Series 4 comes downstairs on Christmas morning 1990, to find the two presents he most wanted, waiting under the tree: a Frightknight trophy with a note saying 'Go on, you earned it!'; and Merlin's head. Gift-wrapped. It plays a tinny version of 'Driving Home For Christmas' by Chris Rea when you pull the beard.

Or perhaps it played a parody...

In memory of Chris Rea. Official lyric video

We're magicked home for Christmas

We're not elated, see our faces

We're magicked for Christmas, yeah

Which on Knightmare's assinine

Got to Level 3

And we were close

To victory

But we got sent away

DISMISS really jars

Magicked home for Christmas

It is the greatest crime seen in Knightmare

Got to the transporter pads

And there's a frightknight hanging round

But soon there'll be a phase shift, yeah

That means no more winners crowned

So a silly sprite

And Merlin did a

Bit, it was trite

They don't consider

Psychological scars

We're magicked home for Christmas

Magicked home for Christmas

With the watchers' sympathies

Just take a look at the adviser next to me

And see his shame

See his shame...