Music Box (series)

Music Box is an series of both fiction and non-fiction written by Barry Gray and published in TV Century 21, generally printed on the same page as the Cosmic Capers series and beginning in its very first issue. The fiction published in the series was presented in the form of poems, while its non-fiction instalments were moreso lessons to the readers of TV Century 21.

Crossover
As a series published in TV Century 21, a magazine where all fiction published within shares a universe (including The Daleks), a couple of instalments of Music Box crossed over with elements of the Doctor Who universe.

The first of these crossovers was, which depicted the Daleks among the things published in an issue of TV Century 21 read by Little Miss Muffet. The second and final of these was, which referenced the Daleks, albeit as something featured in the Doctor Who TV series.