I think some may have already figured this out from the five minute trailer, but now the showrunners have gone ahead and let the cat out of the bag – officially – on who John Wesley Shipp will be playing on The CW's The Flash.
Here's Executive Producer Greg Berlanti's statement:
Given his history with The Flash, [executive producers] Andrew [Kreisberg], Geoff [Johns] and I could only think of one person we wanted to play Barry's father and that was John Wesley Shipp. He gives a fantastic and emotional performance in the pilot and we are looking forward to his presence in many more episodes. Also, personally, it was just wonderful to work with him again since my days at Dawson's Creek. He's a great actor and a great guy.
Shipp, of course, played the original Barry Allen aka The Flash on a short-lived TV series in 1990. Now he'll play Barry Allen's dad opposite Grant Gustin. Passing the torch, indeed.