C1: Champion David O'Donnell (5 wins, 524 points.) A recruitment consultant from Bushey, Hertfordshire.
C2: Challenger Sam Blanning. A financial advisor from Bristol. He went mountaineering with some friends including going up an iron ladder!!
DC: Susie Dent and making her DC debut, Shappi Khorsandi.
RR: Rachel Riley.
OT: Other words or solutions.
R01: K T P E I O E R N
R02: A S C I D L N U I
R03: 50, 75, 9, 4, 2, 6. Target: 607.
TTT: TRUFFLEGO - "You go hunting for truffles and can't remember the way home."
R04: E S J O G S A F N
R05: T H R C E O A I T
R06: 75, 100, 6, 1, 10, 8. Target: 995.
R07: V S M E U A E D B
R08: O P L I T G E N R
R09: 100, 75, 25, 50, 10, 1. Target: 498.
TTT: USEUPCOIN - "He'll never up all his coins, he's got a ton of money."
R10: A Y C O N F I R A
R11: S T X B E A O D C
R12: I L T E G R A N Z
R13: D S R O E I U C O
R14: 100, 75, 5, 5, 8, 2. Target: 545.
R15: T R A D E E X I T (conundrum)
And now a brief interlude before our main feature:
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Enjoy the show.
Round 1: K T P E I O E R N
David: POINTER (7)
Sam: POINTER (7)
DC: PIONEER (7) PROTEIN (7)
OT: TROPEINE (8)
Score: 7–7 (max 8)
Round 2: A S C I D L N U I
David: undials
Sam: UNCLAD (6)
DC: SUNDIAL (7) UNLAID (6)
OT: DULCIANS (8) INDUSIAL (8) SUICIDAL (8)
Score: 7–13 (max 16)
Round 3: 50, 75, 9, 4, 2, 6. Target: 607.
David: 613.
Sam: 609. (6 x 2 x 50) + 9 (7)
RR: 607. (4 x 75) + (6 x 50) + 9 - 2 (10)
Score: 7–20 (max 26)
Teatime teaser: TRUFFLEGO -> FORGETFUL
Round 4: E S J O G S A F N
David: FANGS (5)
Sam: FANGS (5)
DC: SEASON (6) FOSSAE (6)
OT: FOSSANE (7)
Score: 12–25 (max 33)
Round 5: T H R C E O A I T
David: THROAT (6)
Sam: CHATTIER (8)
DC: THEATRIC (8)
OT: ACHROITE (8) THEOCRAT (8)
Score: 12–33 (max 41)
Round 6: 75, 100, 6, 1, 10, 8. Target: 995.
David: 995. (100 x 10) - (6 - 1) (10)
Sam: 995. (100 x 10) - (6 - 1) (10)
Score: 22–43 (max 51)
Shappi talks about accidentally going to the wrong Leicester Square theatre for her own show
Round 7: V S M E U A E D B
David: BEMUSED (7)
Sam: AMUSED (6)
DC: MEDUSA (6)
OT: EMBUSED (7) MEDUSAE (7)
Score: 29–43 (max 58)
Round 8: O P L I T G E N R
David: PORTING (7)
Sam: POINTER (7)
DC: ELOPING (7) RINGLET (7) POLITER (7) GENITOR (7)
OT: GOINTER (7) LENTIGO (7) PELTING (7) PERIGON (7) PETROIL (7) PINGLER (7) PIROGEN (7) PLERION (7) POINTEL (7) POITREL (7) POLTING (7) PONGIER (7) PONTILE (7) POTLINE (7) PRINGLE (7) PROLINE (7) PROTEIN (7) PTERION (7) REPOINT (7) RETINOL (7) RIGOLET (7) TRIGONE (7) TROPINE (7)
Score: 36–50 (max 65)
Round 9: 100, 75, 25, 50, 10, 1. Target: 498.
David: 498. (50 x 10) - ((100 - 75) / 25) - 1 (10)
Sam: 498. (50 x 10) - ((75 / 25) - 1) (10)
Score: 46–60 (max 75)
Teatime teaser: USEUPCOIN -> PECUNIOUS
Round 10: A Y C O N F I R A
David: aircon
Sam: FANCY (5)
DC: CANARY (6) CRANIA (6)
OT: OCARINA (7)
Score: 46–65 (max 82)
Round 11: S T X B E A O D C
David: BOASTED (7)
Sam: COASTED (7)
DC: toasted SEXBOAT (7)
OT: SABOTED (7)
Score: 53–72 (max 89)
Susie's Origins Of Words talks about the origins of "sorry".
Round 12: I L T E G R A N Z
David: ALTERING (8)
Sam: RELATING (8)
DC: INTEGRAL (8) TANGLIER (8)
OT: ALERTING (8) TEAZLING (8) TRIANGLE (8)
Score: 61–80 (max 97)
Round 13: D S R O E I U C O
David: CRUISED (7)
Sam: SOURCED (7)
DC: ODORISE (7)
OT: DECOROUS (8)
Score: 68–87 (max 105)
Round 14: 100, 75, 5, 5, 8, 2. Target: 545.
David: 545. (100 + (75 / 5) - 8 + 2) x 5 (10)
Sam: 550.
Score: 78–87 (max 115)
Round 15: T R A D E E X I T
David buzzes on 24.75 seconds to say EXTRAITED which is incorrect.
Sam does not buzz.
The answer, correctly guessed by Rachel, was EXTRADITE.
Final Score: 78–87 (max 125)
Well, David's run has come to an unexpected halt, but his 5 wins and 602 points currently see him as the #7 seed...., can he hang on, I wonder...
Certainly would've great to have a second David O'Donnell octochamp!! 
Statistics Corner
David:
Total score - 78
Raw score - 89
Total % of max - 62
Raw % of max - 71
Total average score per round - 5.2
Raw average score per round - 5.9
Number of maxes - 7
Sam:
Total score - 87
Raw score - 100
Total % of max - 70
Raw % of max - 80
Total average score per round - 5.8
Raw average score per round - 6.7
Number of maxes - 6
Further summaries are at:
http://cdb.apterous.org/series.php?series=82