4x18 - Suddenly Susan

As Susan and Oliver go through withdrawals in the wake of their aborted romance, he offers her a parting gift -- a talking cockatoo -- who soon flies the coop and gets haplessly stuck in The Gate's venting system, where he creates a squawking uproar. Meanwhile, a vengeful Vicki and Luis conspire to embarrass Ian at his lavish party by inviting his former British band mates from his 1960s stint as a lead singer of a one hit wonder pop group.