Sci Fi have updated their schedulebot with the episode titles for 418 & 419. You may remember they were listed as TBC when we posted the descriptions for 416-419, from the Sci Fi schedule highlights. Anyhow, the titles are:

418: "Prayer"

419: "We're So Screwed, Part 1: Fetal Attraction"

Thanks to forum member Chris Springob for the heads-up.