'Merlin': Ten teasers about 'The Dark Tower' 

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This week's Merlin is possibly series five's strongest episode yet - 'The Dark Tower' sees Gwen (Angel Coulby) plunged into a world of psychological horror when she is captured by the sinister Morgana (Katie McGrath)...

Accompanied by faithful Merlin (Colin Morgan), Arthur (Bradley James) leads his valiant knights on a quest to rescue his beloved - but what will be the true cost of the Queen's freedom?

Merlin continues on BBC One this Saturday (November 10) at 8.05pm.

1. Dark in tone as well as title, this episode isn't one for very young viewers...

2. "There is dark magic coursing through their veins..."

3. There's a moment five minutes in that'll have Merthur fans quivering.

4. "The tower... everything in its shadow was dead..."

5. Gwaine has some rather interesting ideas about what makes for fine cuisine.

6. "It's a trap - she's luring you to your doom..."

7. Flirty imp Queen Mab (Kelly Wenham) is the bringer of bad omens...

8. "I wouldn't be in such a hurry to know..."

9. We get to see Merlin display a new magical ability.

10. "She's a maiden in a tower... a damsel in distress... I was born for this moment!"

Regarding '3. There's a moment five minutes in that'll have Merthur fans quivering.'
My bet is that this supposed Merthur scene involves Arthur telling Merlin that he is afraid of losing/ can not lose Gwen, prompting Merlin to respond to Arthur that he will not lose her, and that they will bring Gwen back.

Yeah I bet it is and I can't wait to watch it seeing as it is clear Arthur loves gwen and considers Merlin a loyal friend...

Yeah me too ellarose88!!! I don't know why but I have a feeling that number 6 is merlin saying it I Arthur?!? I'm probably wrong but that's what u was thinking :)

Is this episode base on a Midsummer Nights Dream, everybody is dreaming. Mab queen of the faeries has woven a spell on them .Is she working with Morgana or bringing bad news to Arthur.