The temporary Nebari Mind-Cleansing procedure in "A Clockwork Nebari". One of the best (worst?) examples of Eye Screamever.
Rygel: I don't want my eyes sucked out!
The scene in "That Old Black Magic" when Maldis, in order to get Crais fired up against Crichton again, conjures up a vision of Crais' late brother, Tauvo, before re-enacting his death. As in, he shows Tauvo exploding into flame and his flesh melting, in graphic detail.
The fate of Aeryn's former friend, Henta, in "Into the Lion's Den Part 2: Wolf in Sheep's Clothing". She confronts Aeryn as the Command Carrier explodes around them, intending to kill her. Before she can, she is burned alive in a sudden explosion... and is alive long enough to actually reach out to Aeryn, even after all the skin has been seared from her body. Ouch.
Scratch 'n' Sniff, features villain of the week Fe'Tor, who sells a powerful aphrodisiac named freslin, which is made primarily from the pheromones and secretions of sentient beings. To this end, he kidnaps young women, including Chiana and Jool, and milks them. After milking Chiana, he attempts to sell her to the highest bidder, and attempts to milk Jool to death. "Disturbing" is putting it mildly.