Robert Picardo, who played The Doctor on "Star Trek: Voyager," will guest star in the upcoming season of "The 4400" on USA Network, according to trektoday.com.

Picardo's official website, robertpicardo.com, recently said that the actor will appear in the fourth episode, which is expected to air on Sunday, June 26, at 9 p.m.

Since "Voyager" finished its seventh and final season in May of 2001, Picardo has been on "Stargate SG-1" and has reprised his role of The Doctor in "Star Trek: The Experience Ð Borg Invasion 4D" in Las Vegas. He has also appeared in many other shows, including a regular stint in "The LyonÕs Den" on NBC.

"The 4400," which was co-created by Rene Echevarria from "Star Trek: Deep Space Nine," follows a group of alien abductees who have returned to Earth, each with a different ability. Former "DS9" staffers Ira Steven Behr and Robert Hewitt Wolfe have also written scripts for the show.

Season two of the series will kick off on Sunday, June 5, at 9 p.m. on USA following a marathon of first-season episodes. A surprise ratings hit from last summer, the first season is also available on DVD.