After well-meaning do-gooder Miss Finch (Sally Kellerman) sends Big Bird (Caroll Spinney) to the suburban Dodo family for adoption, the gawky, gullible eight-footer runs away and heads back to Sesame Street. When word spreads that Big Bird has flown the coop, all his old buddies--human and otherwise--join in the search for their fine-feathered friend. But Big Bird has run into the Sleaze Brothers-