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Teledu Cymru, serving the North and West Wales, commenced broadcasting on Friday 14th September 1962 and was therefore not able to transmit The Avengers prior to Series 2.

 The Avengers — Series 2

No. Title Teledu Cymru (WWN) Transmissions (UK)
1 Mr Teddy Bear Saturday 29th September 1962, 10.05pm (1)
2 Propellant 23 Saturday 6th October 1962, 10.05pm
3 The Decapod Saturday 13th October 1962, 10.05pm
4 Bullseye Saturday 20th October 1962, 10.05pm
5 Mission to Montreal Saturday 27th October 1962, 10.05pm
6 The Removal Men Saturday 3rd November 1962, 10.05pm
7 The Mauritius Penny Saturday 10th November 1962, 10.05pm
8 Death of a Great Dane Saturday 17th November 1962, 10.05pm
9 The Sell-Out Saturday 24th November 1962, 10.05pm
10 Death on the Rocks Saturday 1st December 1962, 10.05pm
11 Traitor in Zebra Saturday 8th December 1962, 10.05pm
12 The Big Thinker Saturday 15th December 1962, 10.05pm
13 Death Dispatch Saturday 22nd December 1962, 10.05pm
14 Dead on Course Saturday 29th December 1962, 10.05pm
Break in Transmission
No further episodes until Friday 11th January 1963 - Intercrime omitted
15 Immortal Clay Friday 11th January 1963, 10.45pm (2)
16 Box of Tricks Friday 18th January 1963, 10.45pm (2)
17 Warlock Friday 25th January 1963, 10.45pm
18 The Golden Eggs Friday 1st February 1963, 10.45pm (2)
School for Traitors Friday 8th February 1963, 10.45pm (3)
The White Dwarf Friday 15th February 1963, 10.45pm (3)
19 Man in the Mirror Friday 22nd February 1963, 10.45pm
20 Conspiracy of Silence Friday 1st March 1963, 10.45pm
21 A Chorus of Frogs Saturday 9th March 1963, 10.05pm
22 Six Hands Across a Table Saturday 16th March 1963, 10.05pm
23 Killer Whale Saturday 23rd March 1963, 10.05pm
Intercrime Transmission not yet located

(1) The channel ran The Avengers in tandem with TWW up to the end of 1962, but then switched to Fridays, independent of all other regions. They rejoined the TWW schedule for the last three episodes. Teledu Cymru failed to transmit one episode of Series 2, Intercrime. The reason for its pre-emption is unknown.
(2) Episode title unconfirmed; transmission confirmed in the Daily Telegraph.
(3) School for Traitors was recorded in studio on the evening of Saturday 9th February 1963, with the VTR session for The White Dwarf being held exactly a week later. Both recording sessions were only a couple of hours in advance of the transmissions in ABC Midlands and other regions. However, newspaper listings show that Teledu Cymru scheduled each episode for the Friday night prior to their recording. Therefore, these two transmission dates must be taken as wholly unreliable, and it is unclear whether or not these two episodes were shown at all on the Welsh channel.

Furthermore, The Avengers Declassified has a theory that rather than being the first region to show episodes following their production, instead Teledu Cymru were actually bringing up the rear. By this we mean that the otherwise skipped Intercrime replaced Immortal Clay and all the episodes moved back by one week. This would mean one episode was not shown (or was screened in a slot we've not found) but at least it would make School for Traitors and The White Dwarf screenable by Teledu Cymru. Evidence, alas, is not currently available.

 The Avengers — Series 3 (Part 1)

No. Title Teledu Cymru (WWN) Transmissions (UK)
24 Brief for Murder Saturday 28th September 1963, 9.50pm
25 The Undertakers Saturday 5th October 1963, 9.50pm
26 Man with Two Shadows Saturday 12th October 1963, 9.50pm
27 The Nutshell Saturday 19th October 1963, 9.50pm
28 Death of a Batman Saturday 26th October 1963, 9.50pm
29 November Five Saturday 2nd November 1963, 9.50pm
30 The Gilded Cage Saturday 9th November 1963, 9.50pm
31 Second Sight Saturday 16th November 1963, 9.50pm
32 The Medicine Men Saturday 23rd November 1963, 8.55pm
33 The Grandeur That Was Rome Saturday 30th November 1963, 8.55pm
34 The Golden Fleece Saturday 7th December 1963, 8.55pm
35 Don't Look Behind You Saturday 14th December 1963, 8.55pm
36 Death a la Carte Saturday 21st December 1963, 8.55pm
37 Dressed to Kill Saturday 28th December 1963, 8.55pm
38 The White Elephant Saturday 4th January 1964, 9.10pm
39 The Little Wonders Saturday 11th January 1964, 9.10pm
40 The Wringer Saturday 18th January 1964, 9.10pm
41 Mandrake Saturday 25th January 1964, 9.10pm

After Teledu Cymru failed financially, partly due to transmitting infrastructure delays beyond their control and Granada Television's decision to cease producing Welsh language content for the channel, it was bought out by Television Wales and West (TWW). From Monday 27th January 1964, TWW controlled both regions, while retaining the Teledu Cymru name. While separate schedules ran in the two ITV regions, the new Teledu Cymru programming mostly followed that of the TWW region, with the occasional English-language programme replaced with Welsh-language content. Consequently, the schedules in Wales were occasionally disrupted by opt-outs to accommodate local programming.

 The Avengers — Series 3 (Part 2)

No. Title Teledu Cymru (TWW) Transmissions (UK)
42 The Secrets Broker Saturday 1st February 1964, 9.10pm
43 Trojan Horse Saturday 8th February 1964, 9.10pm
44 Build a Better Mousetrap Saturday 15th February 1964, 9.10pm
45 The Outside-In Man Saturday 22nd February 1964, 9.10pm
46 The Charmers Saturday 29th February 1964, 9.10pm
47 Concerto Saturday 7th March 1964, 9.10pm
48 Esprit de Corps Saturday 14th March 1964, 9.10pm
49 Lobster Quadrille Saturday 21st March 1964, 9.10pm

 The Avengers — Series 4

No. Title Teledu Cymru (TWW) Transmissions (UK)
50 The Town of No Return Saturday 2nd October 1965, 8.25pm
51 The Grave-Diggers Saturday 9th October 1965, 8.25pm
52 The Cybernauts Saturday 16th October 1965, 8.25pm
53 Death at Bargain Prices Saturday 23rd October 1965, 8.25pm
54 Castle De'ath Saturday 30th October 1965, 8.25pm
55 The Master Minds Saturday 6th November 1965, 8.25pm
56 The Murder Market Saturday 13th November 1965, 8.25pm
Break in transmission
No episodes on Saturdays 20th and 27th November and 4th and 11th December 1965 —
Hwb I'r Galon
and Mad Movies shown in place of The Avengers
57 Two's A Crowd Saturday 18th December 1965, 9.05pm
58 Too Many Christmas Trees Saturday 25th December 1965, 10.10pm
59 Silent Dust Saturday 1st January 1966, 9.05pm
60 Room Without A View Saturday 8th January 1966, 9.05pm
61 Small Game for Big Hunters Saturday 15th January 1966, 9.05pm
62 The Girl from Auntie Saturday 22nd January 1966, 9.05pm
63 The Thirteenth Hole Saturday 29th January 1966, 9.05pm
64 Quick-Quick Slow Death Saturday 5th February 1966, 9.05pm
65 The Danger Makers Saturday 12th February 1966, 9.05pm
66 A Touch of Brimstone Saturday 19th February 1966, 9.05pm
Break in transmission
No episode on Saturday 26th February 1966 —
replaced by re-scheduled episode of The Rat Catchers, which had been pulled earlier in the week owing to content unsuitable for an early timeslot
67 The House That Jack Built Saturday 5th March 1966, 9.05pm
68 A Sense of History Saturday 12th March 1966, 9.20pm
69 How to Succeed... at Murder Saturday 19th March 1966, 9.10pm
70 Honey for the Prince Saturday 26th March 1966, 9.20pm
71 What the Butler Saw Saturday 2nd April 1966, 9.05pm
72 A Surfeit of H2O Tuesday 12th April 1966, 10.37pm
73 The Hour That Never Was Tuesday 19th April 1966, 10.37pm
74 Dial A Deadly Number Tuesday 26th April 1966, 10.37pm
75 Man-Eater of Surrey Green Tuesday 3rd May 1966, 10.35pm

 The Avengers — Series 5
No. Title Teledu Cymru (TWW) Transmissions (UK)
76 From Venus With Love Wednesday 11th January 1967, 8.00pm
77 The Fear Merchants Wednesday 18th January 1967, 8.00pm
78 Escape in Time Wednesday 25th January 1967, 8.00pm
79 The See-Through Man Wednesday 1st February 1967, 8.00pm
80 The Bird Who Knew Too Much Friday 10th February 1967, 8.00pm
81 The Winged Avenger Friday 17th February 1967, 8.00pm
82 The Living Dead Friday 24th February 1967, 8.00pm
Break in Transmission
Teledu Cymru did not transmit The Hidden Tiger on Friday 3rd March 1967.
It was replaced by an episode of the Rediffusion thriller, The Rat Catchers.
83 The Correct Way to Kill Friday 10th March 1967, 8.00pm
84 Never, Never Say Die Friday 17th March 1967, 8.00pm
Break in Transmission
No Series 5 episode on Good Friday 24th March 1967 — repeat of The Cybernauts instead
85 Epic Friday 31st March 1967, 8.00pm
86 The Superlative Seven Friday 7th April 1967, 8.00pm
Break in Transmission
No new episodes until October 1967
87 Return of the Cybernauts Sunday 1st October 1967, 7.25pm
88 Death's Door Sunday 8th October 1967, 7.25pm
89 The £50,000 Breakfast Sunday 15th October 1967, 7.25pm
90 Dead Man's Treasure Sunday 22nd October 1967, 7.25pm
Break in Transmission
No new episodes until May 1968 (on Harlech / HTV)
(4)
The Hidden Tiger Not transmitted during first run in this region

(4) In the 1968 ITV Franchise changes, Television Wales & West and Teledu Cymru (TWW) lost their franchises and were replaced by Harlech Television. Feeling that the decision had been arrived at unjustly, and that their staff were not being treated fairly, both TWW companies ceased broadcasting on Sunday 3rd March 1968, two months before the end of their respective franchises. Interim emergency services 'Independent Television Service for Wales & West' and 'Independent Television Service Teledu Cymru' were hastily set up and broadcast March-May 1968, staffed by former TWW employees. Harlech Television commenced broadcasting on Monday 20th May 1968. Episodes from A Funny Thing Happened on the Way to the Station onwards were aired by this new company — more than a year after most of these episodes had aired in other ITV regions.

Researched and compiled by Simon Coward, Alan Hayes, Andrew Pixley and John Tomlinson

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