 The episode received mostly mixed reviews from critics, with many noting that the episode served as a stop-gap. Robert Shearman and Lars Pearson, in their book Wanting to Believe: A Critical Guide to The X-Files, Millennium & The Lone Gunmen, rated "Three of a Kind" two-and-a-half stars out of five, calling the episode "likeable and good-natured, and utterly redundant, this passes forty-five minutes pleasantly enough, but you 'll be hard pushed to remember them afterwards". Paula Vitaris from Cinefantastique gave the episode a moderately positive review and awarded it two-and-a-half stars out of four. Vitaris noted that the episode did "an adequate job, but all in all, this is a filler episode, more substitutes than the real thing".
