Thomas of Woodstock (play) is alive again at the beginning of "Richard II" until his execution is ordered by Bolingbroke in Act III. There is no instance of a character dying twice in the validated works of Shakespeare. There are, however, inconsistencies in Shakespeare, such as the claim at the end of "Henry IV, Part 2" that Falstaff will be seen again in "Henry V", a promise which is not kept. Furthermore, the character of Falstaff is arguably a different one in the history plays than the character encountered in "The Merry Wives of Windsor", not to mention the apparent setting of that play
The Shakespeare Code "Sycorax" to Shakespeare, Shakespeare says that he will use the name (the joke is that the name in fact derives from Caliban's mother in Shakespeare's play "The Tempest".) Other sequences include subtle references to much earlier episodes. One of the putative lines of "Love's Labour's Won", "the eye should have contentment where it rests", is taken from episode three of the 1965 serial "The Crusade" — a story consciously written in Shakespearean style. The episode concerns the "lost" Shakespeare play "Love's Labour's Won", which is referred to in more than one historical document, but which may be just an alternative