Multiple realities
(covers information from several alternate timelines)
(covers information from several alternate timelines)
Ticks were small arachnids which, along with mites, constituted the subclass Acarina.
In an alternate 1944, Sal claimed some women he had recruited to fight the Nazis had the marksmanship to "shoot the fleas off a tick." (ENT: "Storm Front")
By April 2151, the only inhabited planet visited by Trip Tucker besides Earth had contained no lifeforms other than dust-dwelling ticks. (ENT: "Broken Bow")