Secrecy continues to surround tonight’s House series finale, but a fresh batch of images — obtained exclusively by TVLine — are shedding intriguing new light on both the episode and the hour-long retrospective that leads into it.

The first of four photos below confirms the worst kept secret in the TV-verse: Jennifer Morrison‘s back! The relatively nondescript pic shows House having a rather strong reaction to something Cameron has said. What could it be?

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Meanwhile, the remaining three stills were taken from the preceding trip down memory lane, titled “Swan Song” and airing at 8/7c, and hint at some kind of black tie paintball duel between leading man Hugh Laurie and longtime sidekick Robert Sean Leonard.

Peruse the shots below and then hit the comments with your thoughts/predictions about The End.