"They've sent old supporting actors for me," K. said to himself, and looked around again to confirm his impression. (10.1)
There are certainly elements of farce in The Trial, and instead of lightening up the story, they tend to make the story much more dreadful. To K., his executioners look like a pair of old actors, and the executioners do seem to have an excessive politeness. Perhaps it's because they don't say much, but communicate a lot through pantomime. And really, what could be creepier than a couple of mimes walking you to your execution?