The teddy bear that Radu finds in Space Cases: Who Goes Where (1996) is the very same one that was used in an episode of Babylon 5 (1994) written by Space Cases creator Peter David. It's a running gag between David and Babylon 5 creator J. Michael Straczynski. David's wife gave the bear to JMS, who hates "cute" things. In Babylon 5: There All the Honor Lies (1995), the character of Sheridan tosses it out of an airlock into space (for the same reason). Peter David took revenge in defense of his wife's honor. When Radu brings in the bear, Rosie says, "What kind of dope would toss a perfectly good Earth bear into space?" Later, we find out that the bear was left by an evil race called the "Straczyn." JMS has reportedly sworn vengeance.
Whenever the ship shakes and the crew is thrown off-balance (a common occurrence in space-based series), Radu is usually shown standing perfectly still. This is a result of the character's superhuman strength and equilibrium.