Main Index Pablo Honey The Bends OK Computer Kid A Amnesiac Hail to the Thief In Rainbows The King of Limbs A Moon Shaped Pool Thom Yorke Jonny Greenwood Ed O'Brien Colin Greenwood Philip Selway
During the Kid A era, fragments of the lyrics appeared in this page on radiohead.com, titled 'SHITTY SHOES!':

i am the
devils son and i wish i could be
good for you and make you satisfied if i could keep on
the straight and narrow and not have broke your heartwicked child
and i am a wicked child i am a wicked childand i am
a wicked child i am a
wicked childand i am a wicked child i am a wicked childand i am
a wicked child i am a wicked child because i am a wicked child and i deserve to
go to hell and i am a wicked child i am a wicked child and i am a wicked child i am a wicked childand i am a wicked child i am a

On March 25th 2000, the song was premiered during Radiohead's third webcast. This audio file of the performance is a reconstruction that makes use of sections, that were made available in two videos from the Vapour Brothers website, in order to at least partially improve the sound quality of the low-fi version, that floated around the internet ever since the webcast was aired:
holy mother come to me
for i am a wicked child
i've sinned and i am so confused
and i am a wicked child
i am a wicked child

i am the devil's son
but i wish i could be good
keep you satisfied
yeah i wish i could be good
i wish I could be good

holy mother come to me
for i am a wicked child
i've sinned and i am so confused
yeah i am a wicked child
i am a wicked child

now i wake up in the night
lying on my bed
he's tugging at my arms and legs
and i wanna be dead
i wanna be dead
On August 6th 2002, the song had its only live performance, in Salamanca. The song was probably never a serious option for Hail to the Thief, and so it's not surprising, that it was played only once during the Iberian tour. As a sidenote, during this tour the still unfinished 'Go To Sleep' temporarily started with the lyric "mother mary come to me", which originally had been the opening line of "I Am A Wicked Child", before Thom changed it to "holy mother". Nonetheless, both songs had highly similar opening lyrics at this point:
holy mother come to me
for i am a wicked child
i've sinned and i am so confused
and i am a wicked child
i am a wicked child

i am the devil's son
but i wish i could be good
i walk a crooked mile
but i wish i could be good
i wish i could be good

if i could have kept on the straight and narrow
if i could have kept on the straight and narrow
and not have broke your heart
not have broke your heart

now i wake up in the night
he's tugging at my arms and legs
like i was a marionette

send baby Jesus
send baby Jesus
to radiate his light
to radiate his light
  2002 Iberian tour july 2002 august 2002
Go to Sleep [3] 23 24 27
I am a Wicked Child [1] 06
This handwritten lyric sheet was probably thrown into the audience during the Salamanca concert and later submitted to ateaseweb.com. Interestingly, these lyrics here don't match any of the three versions available:

On August 18th 2003, 'I Am A Wicked Child' was released on the second of two Go to Sleep singles. It was paired with 'Gagging Order'. Apparently both recordings are outtakes from the Kid A sessions, not new recordings from 2002.
The engineering credit for Graeme Stewart could also point to the rehearsals for Hail to the Thief in spring 2002, but a conversation a fan had with Thom after one of the Chicago gigs in 2006 indicates that not just the songs as such, but the specific versions, that were released, come from the Kid A sessions. This has not been confirmed yet.
On June 27th 2006, the song was played instrumentally (with Jonny on banjo) during the San Diego soundcheck: