Pre-watershed worries:� The three-parter starting with Fetal Attraction originally had the overall title We're So Screwed - a title chosen after the cancellation decision.� Sadly, this wasn't quite within BBC guidelines for transmissions at 6.45pm, so we Brits just get the individual episode titles.

Bunnies beware: Fetal Attraction is a pun on the title of 1987 movie Fatal Attraction, starring Glen Close as an obsessive woman determined to ruin the life of the man who dumped her.� Its most famous scene concerns the boiling of a family pet rabbit.

Welcome�back: Shane Briant, who plays officious desk-jockey Trayso previously played the very different role of mad scientist Kaarvok in Eat Me.

Dulcet tones: Claudia Black's breathy voice is heard announcing "previously on Farscape."� Amongst Claudia's many talents is music - in her younger life she was something of a jazz singer.

Triplicate tribe: Sikozu's people, the Kailish, are seen here in their natural environment - as bureaucratic jobsworths administrating the Scarran Empire. �

Back and back and back to the past: References to other episodes include John dressing up as a Peacekeeper, as in Nerve, and a mention of Diagnosians, previously seen in Die Me Dichotomy and Season of Death.

1812's big brother: Scarran DRD's, fittingly, are the hard-nuts of the robot world - big, bulky and heavily armed.

Tongue spotting: D'Argo's tongue saves the day once more, dropping a Charrid soldier in the nick of time.

Spooks: Scorpius has accurate identification codes for a member of the Scarran Ministry of Dissimulation - the Scarran spy corps.� Now, how did he come by such a thing?

Rygel's got the lergy: We learn that Hynerian dermaphollica is a highly contagious, non-species specific illness that causes vomiting, sloughing of skin, and sudden death in Kailish and Sebaceans.

The John Crichton guide to pop culture.

Snurch and display: John describes the security clearance beacons as window-stickers - comparing them to a valid tax disc or parking permit.

Harvey has risen from his grave: John's mental conversation with the returned Harvey takes place in a classic Hammer-horror style vampire's crypt, with Harvey even describing himself as Nosferatu - a famous film bloodsucker.