TV

Derren Brown: The Events - Live
1x04 How to Take Down a Casino [series finale]
Out by just one! That's really rather incredible.
[Watch it (again) on 4oD.]

House
5x07 The Itch
5x08 Emancipation
Tying one's plot and subplots together thematically may be widely touted as a Good Thing, but it's also possible to do it a little too obviously or a little too much, which seems to be the case with both these episodes. On the other hand, The Itch uses the agoraphobic patient as a metaphor for House's locked-up feelings, whereas Emancipation's brother-accidentally-killing-brother subplot is just a straight-up mirroring of the main plot's eventual reveal.

How I Met Your Mother
1x18 Nothing Good Happens After 2 A.M.
1x19 Mary the Paralegal
How I Met Your Mother messes around with time ever so well. Jumping back 20 hours to show Robin's day in Nothing Good... worked quite well, but the "3 months earlier" thing in Mary the Paralegal is an example of the time-messing-around at its best.

Merlin
2x03 The Nightmare Begins
Nice to see Merlin furthering its arc plots, including bringing back and developing characters from the first season. As well as being good for regular viewers and raising the series above Magician of the Week status, it really gives a feel for the five-year plan the producers have. Even the episode title suggests that things are only just getting under way...
On another note, the music this season seems to have been very heavily influenced by The Dark Knight.
[Watch it (again) on iPlayer.]