His younger version was simply a means to an end.

It was the same promise I'd made to a much younger version of myself.

He is revealed to have the ability to shift to a younger version of himself.

Wilson was asked if he saw a younger version of himself.

In fact, he could very well have passed for a younger version of her late husband.

They learn that the older Doctor also invited a younger version of himself.

Miss L is like a younger version of these two.

They wore older and younger versions of the same face.

Otherwise, the young and old versions of this pair have nothing in common.

"It was like being involved with a younger version of my mother."