The last episode focused on Steve (the gibbon) mostly and his mate Lisa; bringing her in from Ireland (she had to be sent to quarentine at another, English zoo that belonged to the same company as Fota, where she came from, due to red tape) and putting her on the island first. Steve was put on the island last (went into his box fine but panicked whilst being driven across the zoo) but unlike Lisa, he hadn't plucked up the courage to go on the island by the end of the ep. He got about midway across the branch bridge before backing inside again, but he and Lisa appeared to have hit it off 
There was also a short bit about two escaped marmosets (who were also put on an island, but had apparently hopped across thick mats of algae onto the mainland trees nearby). The staff soon lured them back though once they got hungry.
I think that was the last episode anyway! There may have been a few other bits in there, but not much, I don't think. There was nothing more on the rhinos. Someone feel free to correct me if I'm wrong
There was also a short bit about two escaped marmosets (who were also put on an island, but had apparently hopped across thick mats of algae onto the mainland trees nearby). The staff soon lured them back though once they got hungry.
I think that was the last episode anyway! There may have been a few other bits in there, but not much, I don't think. There was nothing more on the rhinos. Someone feel free to correct me if I'm wrong