list of out of the unknown episodes 

Statements about this table:
michael j bird and john wile have the same number of story
michael ferguson and peter cregeen direct the same number of episode
the episode by gerald blake be after the episode by raymond menmuir
there be 4 episode in june 1971
episode
title
story
adapted by
director
airdate
exists
401
taste of evil
john wiles
n / a
michael ferguson
21 april 1971
no
402
to lay a ghost
michael j bird
n / a
ken hannam
28 april 1971
yes
403
this body is mine
john tully
n / a
eric hills
5 may 1971
yes
404
deathday
angus hall
brian hayles
raymond menmuir
12 may 1971
yes
episode
title
story
adapted by
director
airdate
exists
405
the sons and daughters of tomorrow
edward boyd
n / a
gerald blake
19 may 1971
no
406
welcome home
moris farhi
n / a
eric hills
26 may 1971
yes
407
the last witness
martin worth
n / a
michael ferguson
2 june 1971
no
episode
title
story
adapted by
director
airdate
exists
408
the man in my head
john wiles
n / a
peter cregeen
9 june 1971
yes
409
the chopper
nigel kneale
n / a
peter cregeen
16 june 1971
no
410
the uninvited
michael j bird
n / a
eric hills
23 june 1971
no