Star Trek: The Next Generation – Timescape [6.25]

Picard, Troi, Data and Geordi, en route to the Enterprise after a conference, encounter a series of odd temporal distortions.  Eventually, they find that the entire ship is frozen in a moment in time, during what is apparently a battle with a Romulan warbird. 

Star Trek: The Next Generation – Rascals [6.7]

A transporter accident causes Picard, Guinan, Ro and Keiko O’Brien to materialize on board the Enterprise transformed into 12 year old children, though still with their adult intellects.