This week's show is blessed by an exclusive three-song session from John Lawrence. John was a founder member of one of Wales' finest bands of all time, Gorky's Zygotic Mynci. Now by any measure that's a fine legacy to have following you around but it's one that shouldn't obscure John's significant musical achievements since he left Gorky's in 1999.

Perhaps the best album he has ever been involved in was his last, the critically lauded (in the likes of The Guardian and Mojo) Rainy Night, an album of great heart, defiant spirit and questing musicality. Ensconced in his Snowdonia home John has surrounded himself with a range of instruments with which to paint himself a whole new album of beauty and heartache.

This session is an insight into that work in progress. I've no idea whether these songs will appear on his next album. They're bruised by some unnamed emotional upheaval, more naked and affecting in their hurt than anything on Bob Dylan or Richard Thompson's post-breakup albums.

The final song, She Chose, in particular, is brave and transcendent in equal measure - hauled along by the creaking sound of John's heart and his presence over the piano. Since the show went out on Sunday night I've received a truckload of emails and messages from people moved and bewitched by these recordings. Check them out while you still can.

Elsewhere, Gorky's former producer and sleeve artist Alan Holmes reminds us of Spoonidols, Ben Hayes does similarly for Tom Wilson, and I have a impressive range of new Welsh music to treat you to: from White Noise Sound's swirling, narcotic psychedelia to Chuggin Petrol's minimal but brilliant dubstep.

Demos / new releases / gig info and any other manner of communication should be sent to themysterytour@gmail.com or posted to:
Adam Walton,
BBC Radio Wales,
Library & Arts Centre,
Rhosddu Road,
Wrexham,
LL11 1AU

This coming Sunday night Saturday's Kids are in session. It's raw and phenomenal. Hopefully see you there.

(Monmouth / Camarthen)
Birds In Berlin

WHITE NOISE SOUND (Swansea)
Sunset (radio Edit)

Y NIWL (Gywnedd)
Deg

HOLLOWED OUT THE SEA (Carmarthen)
City Surf

THE JOY FORMIDABLE (Mold)
Austere (single)

JOHN LAWRENCE (Snowdonia)
Hurt Me (session Track)

KATELL KEINEG (Penpedairheol)
World Of Sex

WITCHES DRUM (Cardiff)
Bad Vibrations

INHIBITOR (Tonteg)
Mutation

UNDER ALIEN SKIES (Prestatyn)
Faint

DAVE JONES TRIO (Port Talbot)
Barry Island

BLAKTRIX (Barry)
No Drama Featuring Ralph Rip Shit

SOPHIE MCKEAND AND MR PHORMULA (Mold / Llanfrothen)
Standing

CHAILO SIM (Pembrokeshire)
Older

PETE LAWRIE (Penarth)
Fell Into The River

HOUDINI DAX (Cardiff)
O.l.l.

THE KEYS (Cardiff / Resolven)
Bitten By Wolves

THE METHOD (Cardiff)
Bitten By Wolves

MESSY JOE (Cardiff / Bangor)
Beaster

CHUGGIN' PETROL (Cardiff)
Halfway House

FALLS (Deeside)
Death In Disco Shoes

JOHN LAWRENCE (Snowdonia)
Painted Ladies (session Track)

JONNY (Pembrokeshire)
Candyfloss

SPOONIDOLS (Caernarfon)
The Kaleidoscope Man

DEER PARK (Newport label)
Strange (radio edit)

GRAMERCY RIFFS (Cardiff)
Stop It

HEHFU (Caerphilly)
Winter Sun And Summer Snow

CANNIBAL GOD (Merthyr Rhymney)
Sucking Life Dry

CRASH DISCO (Bangor)
Token

GINTIS (Rhyl)
The Waltzer Song

THORUN (Cardiff)
Here Come The Robots

SWITCH FUSION FEATURING TOM WILLIAMS & OSIAN JONES (Llanberis)
Freefall

JKLMNO (Wrexham)
The Race

YOUNGTEAM (Rhyl label)
Daydreamer

SSSSNAKES (Swansea)
Don't Tread On Us

BLATNOVA (Pembrokeshire)
... And There You Go

TARAN (Barry)
Bevan

CYRION (Llangefni / Bala)
Tone

DETACHED (Caerphilly)
Teeth Rattling Bone Shaker

JOHN LAWRENCE (Snowdonia)
She Chose (session Track)

FERNHILL (Swansea)
Y Fwynlan O Serch