TYLER JAMES WILLIAMS, OLDER BROTHER OF "LAB RATS" STAR TYREL JACKSON WILLIAMS, GUEST STARS AS FUTURE LEO IN A NEW EPISODE OF "LAB RATS," THURSDAY, JUNE 21 ON DISNEY XD

"Back from the Future" - Davenport's time machine brings Leo, from seven years in the future (played by Tyler James Williams), to present day to prevent Adam, Bree and Chase from going on a mission from which they'll never return. Davenport takes the warning seriously and forbids the Lab Rats from going on the mission, but they decide to sacrifice themselves in hopes of saving the world. Meanwhile, future Leo teaches present day Leo how to be cool and shows Davenport his fate, in a new episode of "Lab Rats," THURSDAY, JUNE 21 (8:30-9:00 p.m., ET/PT) on Disney XD.

"Lab Rats" stars Billy Unger as Chase, Spencer Boldman as Adam, Kelli Berglund as Bree, with Tyrel Jackson Williams as Leo and Hal Sparks as Davenport. Recurring are Angel Parker as Tasha and Will Forte as the voice of Eddy.

Guest starring are Tyler James Williams (Disney Channel's "Let It Shine," "Everybody Hates Chris") as future Leo and Madison Pettis ("The Game Plan," Disney Junior's "Jake and the Never Land Pirates") as Janelle.

"Back from the Future" was written by Ron Rappaport and directed by Victor Gonzalez.

"Lab Rats" carries a TV-Y7 parental guideline.