Tom Bosley returns to ABC Tuesday -- 20 years later.

IT'S ALL RELATIVE -- Fight for Your Invite to Party
The O'Neils and the Stoddard-Banks families feud over the wording of the kids' wedding invitations. Mace still wants to downplay the fact that Liz's parents are gay, which causes Philip and Simon to verbally strike back via drafts of the invitation. Meanwhile, Liz tries desperately to convince Bobby's priest (Tom Bosley) that they are ready for marriage, but the stress of juggling wedding plans and school assignments takes its toll on her in some very embarrassing ways, on the season finale of "It's All Relative," TUESDAY, APRIL 20 (9:30-10:00 p.m., ET), on the ABC Television Network.
Tom Bosley ("Happy Days," "Father Downing Mysteries") guest-stars as Bobby's priest.

I've never seen that show or heard of it, but I'll have to remember to watch that night.

Bad news. The final two episodes (April 13 and 20) have been replaced with According to Jim encores. There is no word yet if or when these two final episodes of the season for It's All Relative will air. So for now, we won't get to see Tom on the season finale :(