Where the third party files an appearance:
(a) the third party and the defendant by whom he was joined may have discovery of one another; and
(b) unless the Court otherwise orders:
(i) the third party may attend and take part at the trial of the proceeding;
(ii) at the trial the questions between the defendant and the third party shall be tried concurrently with the questions between the plaintiff and the defendant; and
(iii) the third party shall be bound by the result of the trial.