So the first three episodes have all ended with an explosion of a ship in which one character, central to the episode, is trapped and dies.

Asylum = Oswin trapped inside the dalek, but it looks like a ship
Solomon = Trapped inside his ship
Kahler Jax = Trapped inside his ship.

Could this be a theme? hint?

Good spot!! I noticed this too -- definitely a theme - has to be

There is also a difference, choice. Kahler Jax chose to explode his ship.

I suppose Oswin did as well. Although she did want to escape.

The Explosion Agenda!??!?!?!

Wait a minute... let's put it all together...

Judging by the several recurring agendas throughout the series:
-The explosion agenda
-The egg agenda
-The Christmas agenda
-The lightbulb agenda

There will certainly be, without doubt, exploding eggs and lightbulbs at Christmas!

Oh sorry, should that have been in a spoiler tag?

what about the press agenda? press buttons.

It's the GAY EXPLOSION AGENDA.

Not sure whether the explosive endings are significant, but undoubtedly all three episodes so far have featured crashed spaceships.
If next week's does too, this has to be a deliberate pattern.

..... and another exploding ship with the baddie on it at the end....

It's back!!!!!!!!!!!!!