 In 1990 , 8 of the 19 audio episodes released by APF Records were converted into radio dramas , which were transmitted on BBC Radio 5 . The success of the radio series encouraged the BBC to acquire the rights to the TV episodes , which it broadcast simultaneously in all regions from September 1991 on BBC 2 . 
 In 1990 , 8 of the 19 audio episodes released by APF Records <a href='uninflect' title='1'><mark>were</mark></a> converted into radio dramas , which <a href='uninflect' title='2'><mark>were</mark></a> transmitted on BBC Radio 5 . The success of the radio series encouraged the BBC to acquire the rights to the TV episodes , which it <a href='uninflect' title='3'><mark>broadcast</mark></a> simultaneously in all regions from September 1991 on BBC 2 . 
In 1990 , 8 of the 19 audio episodes released by APF Records was converted into radio dramas , which was transmitted on BBC Radio 5 . da success of the radio series encouraged the BBC to acquire the rights to the TV episodes , which it broadcasted simultaneously in all regions from September 1991 on BBC 2 .