Lanford Wilson’s “The Talley Trilogy” continues on Aurora’s mainstage. It’s 1977 and Ken Talley has retreated to his family’s farmhouse in Missouri after losing the use of his legs in Vietnam. Family and friends from their student UC Berkeley days gather to pull Ken back from the brink and to decide the fate of the Talley legacy. A heartwarming and often hilarious portrait of the Woodstock generation at the precise moment they realize the fireworks ended yesterday.