S6.E22 Joey's Baptism
Episode aired February 23, 1976.
Archie fears for Joey's mortal soul because he hasn't been baptized and Mike and Gloria don't want to put religion into his life. So, Archie gets the idea that while he is baptizing, that he will sneak down to the church and have it done before he gets back. Edith is completely against it, locking Archie's hat and coat in the closet and refusing to give up the key. While Edith's back is turned, Archie grabs a hat and sweater out of the box that is going to the poor, grabs Joey out of his pram and runs to the church. The minister refuses to perform the baptism without the parent's consent, so Archie sneaks into the sanctuary and does it himself.