Doctor Who, Season 19, Castrovalva Episode guide
4/4 The Master's space/time trap is revealed, with Adric at its heart...
First broadcast: 12 Jan 1982
3/4 Something is wrong with Castrovalva, but the Portreeve cannot help identify the problem.
First broadcast: 11 Jan 1982
2/4 The Zero Room is gone and the Doctor's regeneration is unstable.
First broadcast: 05 Jan 1982