Quantum Leap, Season 3

Mary:
Who are you?

Fake Al:
Yin and yang, good and bad. God...

Sam:
...The Devil.

Fake Al:
In the flesh, so to speak.

Mary:
This isn't possible!

Sam:
Come on Al, tell me he's not real...

Al:
Uh...I...you...ah...he's real. Oh Sam, he's very real.

Mary:
What is happening?

Sam:
Why are you doing this?

Fake Al:
To put an end to your meddling. Who gave you the right to go bungling around in time, putting right what I made wrong?!

Sam:
I'm just trying to get home.

Fake Al:
Well you're not going to make it!