Blessed with a knack for introspective indie pop, Belle and Sebastian explore multiple moods and genres while retaining a playful charm. “Like Dylan in the Movies” rolls along with sweeping strings and chiming piano anchored by head-nodding bass. “Marx and Engels” channels serene, Nico-era Velvet Underground. But it's not all gentle, lilting pop; “Expectations” is a dramatic, horn-assisted jaunt.