Review BLAKE'S 7: SEEK, LOCATE, DESTROY - Episode 06

[Doctor Omega]

I did hear rumours that Terry really wanted the Daleks to appear in Blake's 7. He was very keen to spin them off outside of Doctor Who. That's why we didn't see any between Evil of the Daleks in 1967 and Day of the Daleks in 1972.

Unfortunately, he also blocked the oversea sales of POWER and EVIL - to avoid "marketplace confusion" while he was trying to flog his Dalek series, I guess. An unfortunate side-effect is that they are missing to this day, of course.