 This episode racked up a total of no fewer than four Star Trek  series regulars. In addition to BL regulars William Shatner (qv)  (Kirk in _"Star Trek" (1966)_ (qv) and Rene Auberjonois (qv) (Odo  in _"Star Trek: Deep Space Nine" (1993)_ (qv), also featured were  Armin Shimerman (qv) (Quark in Deep Space 9) and Ethan Phillips,  (Neelix in _"Star Trek: Voyager" (1995)_ (qv)